&EPA
United States
Environmental Protection
Agency
Solid Waste And
Emergency Response
(5201 G)
EPA/540/R-95/075V^
PB95-962907
9200 5-706C
May 1995
SUPERFUND:
Progress at
National
Priority
List Sites
CALIFORNIA
1995 UPDATE
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How to Use the NPL Book
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41
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The site fact sheets presented in this book
are comprehensive summaries that cover a
broad range of information. The fact sheets
describe hazardous waste sites on the NPL and
their locations, as well as the conditions
leading to their listing ("Site Description").
The summaries list the types of contaminants
that have been discovered and related threats
to public and ecological health ("Threats and
Contaminants"). "Cleanup Approach" pres-
ents an overview of the cleanup activities
completed, underway, or planned. The fact
sheets conclude with a brief synopsis of how
much progress has been made in protecting
public health and the environment. The
summaries also pinpoint other actions, such as
legal efforts to involve polluters responsible
for site contamination and community con-
cerns.
The fact sheets are arranged in alphabetical
order by site name. Because site cleanup is a
dynamic and gradual process, all site informa-
tion is accurate as of the date shown on the
bottom of each page. Progress is always being
made at NPL sites, and the EPA periodically
will update the site fact sheets to reflect recent
actions. The following two pages show a
generic fact sheet and briefly describe the
information under each section.
How Can You Use
This State Book?
You can use this book to keep informed
about the sites that concern you, particu-
larly ones close to home. The EPA is commit-
ted to involving the public in the decision
making process associated with hazardous
waste cleanup. The Agency solicits input from
area residents in communities affected by
Superfund sites. Citizens are likely to be
affected not only by hazardous site conditions,
but also by the remedies that combat them.
Site cleanups take many forms and can affect
communities in different ways. Local traffic
may be rerouted, residents may be relocated,
temporary water supplies may be necessary.
Definitive information on a site can help
citizens sift through alternatives and make
decisions. To make good choices, you must
know what the threats are and how the EPA
intends to clean up the site. You must under-
stand the cleanup alternatives being proposed
for site cleanup and how residents may be
affected by each one. You also need to have
some idea of how your community intends to
use the site in the future, and you need to know
what the community can realistically expect
once the cleanup is complete.
The EPA wants to develop cleanup methods
that meet community needs, but the Agency
only can take local concerns into account if it
understands what they are. Information must
travel both ways in order for cleanups to be
effective and satisfactory. Please take this
opportunity to learn more, become involved,
and assure that hazardous waste cleanup at
"your" site considers your community's
concerns.
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NPL LISTING HISTORY
Provides the dates when the
site was Proposed, made Final,
and Deleted from the NPL.
SITE RESPONSIBILITY
Identifies the Federal, State,
and/or potentially responsible
parties taking responsibility
for cleanup actions at the site.
ENVIRONMENTAL
PROGRESS
Summarizes the actions to
reduce the threats to nearby
residents and the surrounding
environment and the progress
towards cleaning up the site.
SITE NAME
STATE
EPA ID* ABCOOOOOOO
Site Description
EPA REGION XX
COUNTY NAME
LOCATION
Other Names:
1
: xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxxxx :
: xxxxxxxxxx xxxx xxxxxxxx xxxx xx xxxxxxxxx xx xxxxxx xxxxxxxx \
: xxx xxxxxxxxxxxxx xx xxxxxx xxxx xxxxx xxxx ;
xxxxxxx xxx xxx5atM*xxxxxx xxxxx xxxxxx xxxxxxxx xxxxxxxx xxxx ;
xxxxxxxxxxxx ii ii ii ii ii ii iiiiNt)m4iir innr xx xxxxxxxxx xxxxx xxxx xxxx xxxxx xxxxxxx xxxxxxxx
XXXXXXXX XXXXXXXXX XXXX II II IHlTHmgillil II II XXXXXXXX XXXXX XXXX XXXXX XXX XXX XXXXXX
XXXXXXXXXXXX XX XXXXXXX XXX I II I II II IMTTTliM [L11 " XXXXXX XX XXXX XXX XXXXX XXX XXXXX XXX XXXXX
Site Responsibility:
xxxxxx xxx xxxxx
xxxxxx xxxxxxxxx xxxxxxxx
xxxxxxxxxxxxx xxxxxxxxx
NPL Listing History
Proposed XX/XX/XX
Final XX/XX/XX
Threats and Contaminants
xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx
XXXXXXXXX XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX
XXXXXXXX XXX XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX
xxx xxxxxxxxxx xxxxxxxx xxxxxxx xxx xxxxxx xxxxxx xxxxx xxxxxx
XXXXXXXX XXXX XXXXXXXXXX XXXXXXXX XXXXXXXXXXXX XXXXXXXXX XXXX X XXX XX XXXXXXXXX
xxxx xxxx xxxxx xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxxx xxxx xxxx xxxxx xxxx
Cleanup Approach
xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxxxx
XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX XXXXXXXX
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X XXX XXXXXXXX
Response Action Status
xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx :
XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX \
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X :
xxxxxxxx xxxxxxx xxx xxxxxx xxxxxx xxxxx xxxxxx xxxxxxxx xxxxxxxx :
XXXXXXXXXX XXXXXXXX XXXXXXXXXXXX XXXXXXXXX XXXX X XXX XX XXXXXXXXX XXXXX XXXX XXXX XXXXX
xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxxx xxxx xxxx xxxxx xxxx xxxxxxxx xxxxx xxxx xxxxx xxx
XXX XXXXXX XXXXXXXXXXXX XX XXXXXXX XXX XXXXXX XX XXXXXX XXXXXXXX XXX :
Site Facts:
xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx
XXXXXXXXX XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X XXX
^^HXXXXXX XXX XXXXXX
Environmental Progress
xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxxxx xxxxxxxxx
XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX XXXXXXXX XXX
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X XXX XXXXXXXXXX
xxxxxxxx xxxxxxx xxx xxxxxx xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx
Site Repository
xxxxxx xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxxxx :
\
SITE REPOSITORY
Lists the location of the primary site repository. The site
repository may include community relations plans, public
meeting announcements and minutes, fact sheets, press
releases, and other site-related documents.
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SITE DESCRIPTION
This section describes the location and history of the site. It includes descrip-
tions of the most recent activities and past actions at the site that have con-
tributed to the contamination. Population estimates, land usages, and nearby
resources give readers background on the local setting surrounding the site.
THREATS AND CONTAMINANTS
The major chemical categories of site contamination are noted, as well as
which environmental resources are affected. Icons representing each of the
affected resources (may include air, groundwater, surface water, soil, and
contamination to environmentally sensitive areas) are included in the margins
of this section. Potential threats to residents and the surrounding environ-
ments arising from the site contamination also are described.
CLEANUP APPROACH
This section contains a brief overview of how the site is being cleaned up.
RESPONSE ACTION STATUS
Specific actions that have been accomplished or will be undertaken to clean
up the site are described here. Cleanup activities at NPL sites are divided
into separate phases, depending on the complexity and required actions at the
site. Two major types of cleanup activities often are described: initial,
immediate, or emergency actions to quickly remove or reduce imminent
threats to the community and surrounding areas; and long-term remedial
phases directed at final cleanup at the site. Each stage of the cleanup strategy
is presented in this section of the summary. Icons representing the stage of
the cleanup process (initial actions, site investigations, EPA selection of the
cleanup remedy, engineering design phase, cleanup activities underway, and
completed cleanup) are located in the margin next to each activity descrip-
tion.
SITE FACTS
Additional information on activities and events at the site are included in this
section. Often details on legal or administrative actions taken by the EPA to
achieve site cleanup or other facts pertaining to community involvement with
the site cleanup process are reported here.
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Guide to the NPL Book Icons
The "icons," or symbols, accompanying the text allow the reader to see at a glance which envi-
ronmental resources are affected and the status of cleanup activities at the site.
Icons in the Threats
and Contaminants
Section
Icons in the Response
Action Status Section
Contaminated Groundwater re-
sources in the vicinity or underlying
the site. (Groundwater is often used
as a drinking water source.)
Contaminated Surface Water and
Sediments on or near the site.
(These include lakes, ponds,
streams, and rivers.)
Contaminated Air in the vicinity of
the site. (Air pollution usually is
periodic and involves contaminated
dust particles or hazardous gas
emissions.)
Contaminated Soil and Sludges on
or near the site. (This contamination
category may include bulk or other
surface hazardous wastes found on
the site.)
Threatened or contaminated Envi-
ronmentally Sensitive Areas in the
vicinity of the site. (Examples
include wetlands and coastal areas
or critical habitats.)
Initial, Immediate, or Emergency
Actions have been taken or are
underway to eliminate immediate
threats at the site.
Site Studies at the site to determine
the nature and extent of contamina-
tion are planned or underway.
Remedy Selected indicates that site
investigations have been concluded,
and the EPA has selected a final
cleanup remedy for the site or part
of the site.
Remedy Design means that engi-
neers are preparing specifications
and drawings for the selected
cleanup technologies.
Cleanup Ongoing indicates that the
selected cleanup remedies for the
contaminated site, or part of the site,
currently are underway.
Cleanup Complete shows that all
cleanup goals have been achieved
for the contaminated site or part of
the site.
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EPA ID
Number
CAT080034234
CAD048634059
CAD980358832
CAD042728840
CAD980496863
CA8170024261
CAD048645444
CAD052384021
CA2170023533
CA3570024551
CAD980638860
CAD980817217
CAD06301 5887
CA7170024528
CAD055753370
CAD980498455
CAD009212838
CAD029544731
CAD000626176
CA1 570024504
CA61 70023208
CAD097012298
CAD095989778
CAD990793887
CA7210020676
CAD980636914
CAD071530380
CAD980498562
CA2570024453
CAD980884209
CAD980736284
CAD061620217
CAT000612184
CAD092212497
CAD041472341
CAD980498612
CAD000625731
CAD009103318
CA9800013030
CAD980737613
CAD009112087
CA2890190000
CA2890090002
CA2890012584
CAT000646208
CAD029295706
CAD065021594
Site Name
ADVANCED MICRO DEVICES, INC. (BLDG. 915)
ADVANCED MICRO DEVICES, INC.
AEROJET GENERAL CORP.
APPLIED MATERIALS
ATLAS ASBESTOS MINE
BARSTOW MARINE CORPS LOGISTICS BASE
BECKMAN INSTRUMENTS (PORTERVILLE PLANT)
BROWN & BRYANT, INC. (ARVIN PLANT)
CAMP PENDLETON MARINE CORPS BASE
CASTLE AIR FORCE BASE
CELTOR CHEMICAL WORKS
COALINGA ASBESTOS MINE
COAST WOOD PRESERVING
CONCORD NAVAL WEAPONS STATION
COOPER DRUM CO.
CRAZY HORSE SANITARY LANDFILL
CTS PRINTEX, INC.
DEL AMD FACILITY
DEL NORTE PESTICIDE STORAGE
EDWARDS AIR FORCE BASE
EL TORO MARINE CORPS AIR STATION
FAIRCHILD SEMICONDUCTOR CORP (S SAN JOSE)
FAIRCHILD SEMICONDUCTOR CORP (MT VIEW)
FIRESTONE TIRE & RUBBER CO. (SALINAS PLANT)
FORT ORD
FRESNO MUNICIPAL SANITARY LANDFILL
FRONTIER FERTILIZER
GBF, INC., DUMP
GEORGE AIR FORCE BASE
HEWLETT-PACKARD (620-640 PAGE MILL ROAD)
INDUSTRIAL WASTE PROCESSING
INTEL CORP. (MOUNTAIN VIEW PLANT)
INTEL CORP. (SANTA CLARA III)
INTEL MAGNETICS
INTERSIL INC./SIEMENS COMPONENTS
IRON MOUNTAIN MINE
J. H. BAXTER & CO.
JASCO CHEMICAL CORP.
JET PROPULSION LABORATORY (NASA)
JIBBOOM JUNKYARD
KOPPERS CO. INC. (OROVILLE PLANT)
LABORATORY FOR ENERGY-RELATED HEALTH RESEARCH/OLD
CAMPUS LANDFILL (USDOE)
LAWRENCE LIVERMORE LABORATORY (SITE 300)
LAWRENCE LIVERMORE LABORATORY (USDOE)
LIQUID GOLD OIL CORP.
LORENTZ BARREL & DRUM CO.
LOUISIANA-PACIFIC CORP.
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EPA ID
Number
CA4570024527
CA8570024143
CA4570024337
CAD980498695
CAD009106527
CAD000074120
CAD981997752
CA2170090078
CAD049236201
CAD008242711
CAD041472986
CAD981434517
CA4570024345
CAT080012024
CAD980636781
CAD980736151
CAD981995947
CAD009205097
CA7210020759
CA0210020780
CAD980894893
CAD980894901
CAD980894984
CAD980894976
CAD980677355
CAD980818512
CAD980818579
CAD980817985
CAD029452141
CA8210020832
CAD981171523
CAD980894885
CAD980816466
CAD009138488
CAD066635442
CAT080012826
CAD980893275
CAD990832735
CAD009106220
CAD009111444
CA4971520834
CA5570024575
CA1170090087
CAD009159088
CAD981436363
CAD063020143
CAD980884357
CAD980893234
Site Name
MARCH AIR FORCE BASE
MATHER AIR FORCE BASE
MCCLELLAN AIR FORCE BASE (GROUND WATER CONTAMINATION)
MCCOLL
MCCORMICK & BAXTER CREOSOTING CO.
MGM BRAKES
MODESTO GROUND WATER CONTAMINATION
MOFFETT NAVAL AIR STATION
MONOLITHIC MEMORIES
MONTROSE CHEMICAL CORP.
NATIONAL SEMICONDUCTOR CORP.
NEWMARK GROUND WATER CONTAMINATION
NORTON AIR FORCE BASE
OPERATING INDUSTRIES, INC., LANDFILL
PACIFIC COAST PIPE LINES
PURITY OIL SALES, INC.
RALPH GRAY TRUCKING CO.
RAYTHEON CORP.
RIVERBANK ARMY AMMUNITION PLANT
SACRAMENTO ARMY DEPOT
SAN FERNANDO VALLEY (AREA 1)
SAN FERNANDO VALLEY (AREA 2)
SAN FERNANDO VALLEY (AREA 3)
SAN FERNANDO VALLEY (AREA 4)
SAN GABRIEL VALLEY (AREA 1)
SAN GABRIEL VALLEY (AREA 2)
SAN GABRIEL VALLEY (AREA 3)
SAN GABRIEL VALLEY (AREA 4)
SELMA TREATING CO.
SHARPE ARMY DEPOT
SOLA OPTICAL USA, INC.
SOUTH BAY ASBESTOS AREA
SOUTHERN CALIFORNIA EDISON CO. (VISALIA)
SPECTRA-PHYSICS, INC.
STOKER COMPANY
STRINGFELLOW
SULPHUR BANK MERCURY MINE
SYNERTEK, INC. (BUILDING 1)
T. H. AGRICULTURE & NUTRITION CO.
TELEDYNE SEMICONDUCTOR
TRACY DEFENSE DEPOT
TRAVIS AIR FORCE BASE
TREASURE ISLAND NAVAL STATION-HUNTERS POINT ANNEX
TRW MICROWAVE, INC (BUILDING 825)
UNITED HECKATHORN CO.
VALLEY WOOD PRESERVING, INC.
WASTE DISPOSAL, INC.
WATKINS-JOHNSON CO. (STEWART DIVISION)
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EPA ID
Number Site Name
CAD980894679 WESTERN PACIFIC RAILROAD CO.
CAD001864081 WESTINGHOUSE ELECTRIC CORP. (SUNNYVALE PLANT)
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ADVANCED M
DEVICES, INC.
(BUILDING 915)
CALIFORNIA
EPA ID# CAT080034234
Site Description
EPA REGION 9
Santa Clara County
Sunnyvale
Other Names:
AMD 915 Deguine
Advanced Micro Devices, Inc. manufactures semiconductor and microprocessor devices on this 5
1/2-acre site. Building 915 was built on former agricultural land in 1973. At that time, three
underground acid neutralization tanks were installed north of the building. The building's
operations also involved underground storage tanks of waste organic solvents. In 1981, the
company identified volatile organic compounds (VOCs) in wells near the building. High levels of
solvents present in the on-site soils resulted from leaking tanks and spills during the solvent
handling. Two other NPL sites have contributed to the contaminated groundwater plume:
Advanced Micro Devices, Inc. and TRW Microwave, Inc.; a third facility, Signetics, Inc., has
been removed from the NPL but the potentially responsible parties are required to participate in
the cleanup process under Regional Water Quality Control Board Orders. The closest homes are
located 400 feet north of the site. There was contamination from the site that had the potential to
reach the deep groundwater that supplies municipal wells within 3 miles of the site. These wells
provide drinking water to approximately 200,000 people in Santa Clara, Sunnyvale, and
Mountain View,
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 08/30/90
Threats and Contaminants
Groundwater contains various VOCs. The soil contaminated with organic solvents has
been removed. People who come into direct contact with or ingest the contaminated
water may be at risk.
April 1995
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Cleanup Approach
Response Action Status
Immediate Actions: In 1982, Advanced Micro Devices removed approximately
5,600 cubic yards of contaminated soil and a three-tank underground acid
neutralization system, with a combined capacity of 4,700 gallons. The soil was
transported to a federally approved hazardous waste facility. One of the tanks was found to have
a hole in its side. Five additional underground storage tanks were removed between 1982 and
1983. Between 1982 and 1983, five groundwater extraction wells and pumps were installed to
stop the migration of contaminants off site. Seven more wells were installed between 1983 and
1985 to provide an additional hydraulic barrier to trap the contaminant plume migrating off site.
Water from these wells is being treated by an air stripper and carbon adsorption to remove
VOCs. In addition, groundwater extracted from 18 other off-site wells, installed as part of the
cleanup activities for the other NPL sites in the area, is being treated by the air stripping tower
and carbon adsorption at this site. All construction is completed. Groundwater treatment will
continue until established goals for the site are met.
Entire Site: In 1991, Advanced Micro Devices completed an investigation, under
State supervision, to determine the type and extent of contamination at the site. The
EPA chose to continue operation of the existing groundwater extraction and treatment
system, which treats the water by air stripping and carbon adsorption, until established cleanup
levels are met.
Environmental Progress
Construction of all cleanup remedies has been completed. The removal of contaminated soils and
tanks and the continued treatment of contaminated groundwater have reduced the potential for
exposure to hazardous materials at the Advanced Micro Devices, Inc. (Building 915) site.
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region,
2101 Webster Street, Suite 500, Oakland, CA 94612
April 1995
ADVANCED MICRO DEVICES, INC.
(BUILDING 915)
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ADVANCED
DEVICES, INC.
CALIFORNIA
EPA ID# CAD048634059
EPA REGION 9
Santa Clara County
Sunnyvale
Other Names:
AMD 901/902
AMD - Thompson Place
Site Description
The Advanced Micro Devices, Inc. (AMD) site covers 6 acres in Sunnyvale, where the company
manufactures electronic equipment. Contamination of the groundwater has resulted from localized
spills and leaking underground storage tanks and piping. Nearby facilities have contributed to the
contaminated groundwater plume and are participating in the cleanup of this site. These facilities,
Advanced Micro Devices (Building 915) and TRW Microwave Inc., are also sites on the NPL. A
third site, Signetics, Inc., has been removed from the NPL, but the potentially responsible parties
continue to assist in cleanup of the groundwater by order of the Regional Water Quality Control
Board. Approximately 50,000 people live within 3 miles of the site, and about 300,000 people
depend on nearby municipal groundwater wells as a source of drinking water. The closest
residence is l/i mile away. No private wells are used in the vicinity of the facility. The municipal
wells, located about !£ mile from the site, do not show signs of contamination.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Groundwater contains volatile organic compounds (VOCs) such as trichloroethylene
(TCE) and freon. Soils also are contaminated with VOCs. People who come in direct
contact with or accidentally ingest contaminated groundwater or soil may be at risk.
April 1995
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Cleanup Approach
Response Action Status
Immediate Actions: Following the removal of two acid neutralization tanks, AMD
established a groundwater extraction and treatment system. AMD is continuing to
participate with Signetics and TRW in extracting and treating contaminated
groundwater through air stripping devices followed by carbon adsorption.
Entire Site: Under State supervision, AMD completed an investigation determining
the type and extent of contamination on the site. The EPA selected the cleanup
remedy in late 1991. The remedy calls for excavating contaminated soil followed by
off-site incineration, continuing the ongoing operation of the existing groundwater extraction and
treatment system, and installing new wells at the leading edge of the off-site commingled plume.
Incineration of the soil and well installation were completed in late 1992.
Site Facts: In 1984, the State issued a Cleanup and Abatement Order, requiring Advanced
Micro Devices, Signetics, and TRW Microwave to develop a joint plan to prevent the further
migration of contaminants. A new order was issued in April 1989, requiring an investigation with
the neighboring TRW and Signetics sites. This order did not include AMD Building 915, which
is an adjacent, but separate, NPL site.
Environmental Progress
Construction of all cleanup remedies is complete at the Advanced Micro Devices, Inc. site. The
removal of underground tanks, contaminated soil, and ongoing operation of the groundwater
treatment system is helping to keep the contaminant levels within acceptable limits and is
preventing the further spread of contaminants.
Site Repository
Regional Water Quality Board, San Francisco Bay Region
2101 Webster Street, Suite 500
Oakland, CA 94612
April 1995 2 ADVANCED MICRO DEVICES, INC.
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AEROJET GEN
CORP.
CALIFORNIA
EPA ID# CAD980358832
EPA REGION 9
Sacramento County
Rancho Cordova
Site Description
The Aerojet General Corp. site covers 8,500 acres near Rancho Cordova, 15 miles east of
Sacramento. Since 1953, Aerojet and its subsidiaries have manufactured liquid and solid
propellant rocket engines for military and commercial applications and have formulated a number
of chemicals, including rocket propellant agents, agricultural, pharmaceutical, and other industrial
chemicals. In addition, the Cordova Chemical Company operated a chemical manufacturing
facility on the Aerojet complex from 1974 to 1979. Both companies disposed of unknown
quantities of hazardous waste chemicals, including trichloroethylene (TCE) and other chemicals
associated with rocket propellants, as well as various chemical processing wastes. Some wastes
were disposed of on the site in surface impoundments, landfills, deep injection wells, leachate
fields, and directly on the ground. Other wastes were burned. Underlying the site is an extensive
50-foot-deep gold dredge tailings, a remnant of past mining operations. The communities
potentially affected by this site are Rancho Cordova, population 43,000; Carmichael, population
43,000; and Sacramento, population 309,000. The closest residence lies about 500 feet away
from the site. Groundwater is used extensively throughout the Rancho Cordova area to supply
municipal, domestic, and industrial water. About 16 public and private drinking water supply
wells have been contaminated. Some of these wells have been closed and Aerojet is providing
wellhead treatment to others. Aerojet continues to monitor drinking water supplies to assure
compliance with drinking water standards. The northeastern edge of the site is about 1/2 mile
from the American River. Lake Natoma and Alder Creek are nearby and are used for
recreational activities. The river is used for public water supplies.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/23/82
Final Date: 09/08/83
April 1995
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Threats and Contaminants
Groundwater and surface water contain volatile organic compounds (VOCs) such as
TCE, perchloroethylene (PCE), chloroform, and Freon-113. Soils are contaminated
with VOCs and heavy metals including antimony, arsenic, cadmium, and zinc. People
who come in direct contact with, or accidentally ingest, contaminated groundwater
may be at risk. In the past, groundwater containing TCE has been found on the banks
of the American River. Recent sampling has shown no reoccurrence of TCE in the
groundwater.
Cleanup Approach
The site is being addressed in four stages: interim actions and three long-term remedial phases
directed at cleanup of the entire site, the American River, and Area 40.
Response Action Status
Interim Actions: Between 1983 and 1986, six groundwater extraction and treatment
facilities were installed as a barrier system to prevent further movement of
contaminants off site. The facilities are a series of injection and extraction wells and
a groundwater treatment system built to intercept groundwater as it moves off the facility
boundary. Additional wells are currently being installed. Studies are underway to improve the
effectiveness of the extraction and treatment facilities and to incorporate them into a final remedy
at the site.
Entire Site: Under EPA, State Department of Health Services, and Regional Water
Quality Control Board oversight, Aerojet began investigating the nature and extent of
groundwater and soil contamination throughout the site. The first phase of the
investigation addressed soil contamination and was completed in 1994. A second investigation
phase, which includes treatability studies and a technology evaluation to assist in selecting final
measures for groundwater cleanup is scheduled to be completed in late 1996.
American River: Aerojet completed an investigation in 1993 of the nature and
extent of groundwater contamination on the north side and beneath the American
River. In 1991, VOCs were detected in the groundwater samples Aerojet took from
monitoring wells. Pumping and treating the groundwater, using aqueous phase carbon adsorption,
was selected as the interim remedy, and is currently being designed. The system is scheduled to
be operational in the summer of 1995.
Area 40: An investigation addressing soil and groundwater contamination at Area
40, an Aerojet General owned parcel of land west of the facility borders, is currently
underway and is scheduled for completion in the fall of 1995. The investigation will
explore the nature and extent of contamination and will recommend alternatives for cleanup.
April 1995 2 AEROJET GENERAL CORP.
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Environmental Progress
The interim groundwater treatment system currently in operation at the Aerojet General facility is
reducing contaminant levels and is preventing the further spread of the contaminant plume while
final cleanup remedies are being planned.
Site Repository
Carmichael Regional Library, 5605 Marconi Avenue, Carmichael, CA 85608
AEROJET GENERAL CORP.
April 1995
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APPLIED MATE
CALIFORNIA
EPA ID# CAD042728840
Site Description
EPA REGION 9
Santa Clara County
Santa Clara
Applied Materials manufactures deposition equipment used in the semiconductor industry on this
9-acre site in Santa Clara. Monitoring wells on the site indicate the presence of volatile organic
compounds (VOCs). Contamination is believed to have resulted from leaking pipes leading to
underground tanks associated with an acid neutralization system. This is one of 28 sites in the
South Bay Area of San Francisco. Facilities at these sites have used a variety of toxic chemicals,
primarily chlorinated organic solvents, which have contaminated a common groundwater basin.
Although the sites are listed separately on the NPL, the EPA intends to combine cleanup
activities at some of the sites as part of an area-wide approach to the contamination. The area
surrounding the site is used mostly for light industrial, commercial, and residential purposes. The
population of the City of Santa Clara is about 90,000 people. Approximately 300,000 people
depend on groundwater within 3 miles of the site as a source of drinking water.
Site Responsibility:
This site is being addressed through
Federal, State, local, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Groundwater contains VOCs such as trichloroethylene (TCE). The contaminants in the
groundwater could pose a threat to human health if the groundwater is used as a
source of drinking water in the future. Presently, there do not appear to be any threats
associated with exposure to these contaminants, because area drinking water wells
have not been affected by the contaminant plume. Soils were thought to contain
VOCs, but studies have shown that they are not contaminated.
April 1995
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Cleanup Approach
Response Action Status
Initial Actions: In 1984, Applied Materials installed a system to pump and treat
contaminated groundwater. The system consists of three extraction wells, an
extraction pit, and a dual-column air stripper. In 1985, underground storage tanks
and some of the surrounding soil were excavated, and an excavation pit was built. In addition, a
downgradient extraction well and a second deep monitoring well were installed to determine the
extent of contaminant migration. The treated groundwater is discharged to a storm drain system,
which flows into San Tomas Aquino Creek and South San Francisco Bay.
Groundwater: Under supervision by the State, Applied Materials completed an
investigation into the extent of groundwater and soil contamination at the site. In
1990, the EPA chose to continue using the pump and treat system installed in 1984 to
remove contaminants from the groundwater. All construction activities have been completed and
the potentially responsible parties continue to operate and maintain the groundwater treatment
system.
Soil: In 1990, under the direction of the Bay Area Water Quality Control Board, the
potentially responsible parties began a study of the hazards posed by contaminated
soil beneath the manufacturing facility. In 1993, it was determined the surface soils
are not contaminated and the saturated soils under the building will be cleaned through the
groundwater remedy.
Environmental Progress
Construction of all cleanup remedies is complete. The groundwater treatment system currently in
operation at the Applied Materials site is reducing contaminant levels and preventing the further
spread of the contaminant plume. The system will continue until cleanup goals are met.
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region,
2101 Webster Road, Suite 500, Oakland, CA 94612
April 1995 2 APPLIED MATERIALS
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ATLAS ASB
MINE
CALIFORNIA
EPA ID# CAD980496863
EPA REGION 9
Fresno County
18 miles northwest of Coalinga
Other Names:
Arroyo Pasejaro
Hollister Resource/Bureau of
Land Management
Site Description
The Atlas Asbestos Mine site covers 435 acres near Coalinga, California. The mine operated
from 1963 until 1979 and consists of the asbestos mine, a processing mill, support buildings, and
extensive asbestos mine tailings. During operation, some milling and mining products from Atlas
and the Coalinga Asbestos Mine were transported to the City of Coalinga. In addition, the
Coalinga Asbestos Mine, also listed on the NPL and located about 3 miles away, deposited its
milling and mining products in Coalinga. (For additional information, please see the separate
listing for Coalinga Asbestos Mine). The 107-acre area in the City of Coalinga was operated as
an asbestos milling, manufacturing, storage, and transportation center. It consists of four distinct
areas: the warehouse, which once was a mining waste distribution center and now houses 1,600
cubic yards of mining waste; a storage yard containing asbestos-contaminated stacked pipes; a
shipping yard used as an asbestos distribution center by the Atlas Asbestos Company; and the
U.S. Asbestos Company, which currently stores piles of asbestos-contaminated mining waste.
The Atlas facility drains directly into White Creek, which drains into Los Gatos Creek, a
tributary of the Arroyo Pasejaro, a flood area along the California Aqueduct. A detention basin
was built in the flood plain to store water during heavy runoff and to allow the asbestos-laden
sediment to settle. Sediments carried by floodwaters have silted up the detention basin and have
diminished its storage capacity. As a result, during heavy floods the waters may be released into
the canal through four drain inlets, and asbestos can be carried into the aqueduct. Elevated levels
of asbestos have been found in the aqueduct. However, most of the downstream users of the
aqueduct water are protected by filtration and settling pond systems, which trap most of the
asbestos fibers. The area surrounding the Atlas site is primarily rural. The land is used for
ranching, farming, and recreational activities such as hunting, hiking, camping, and off-road
vehicles. About 10 ranchers live within 5 miles of the site. The closest community is Coalinga,
about 18 miles away, with a population of approximately 8,000 people.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 09/01/84
April 1995
-------
Threats and Contaminants
Air, surface water, sediments, and soils are contaminated with asbestos. Soil and
building debris in the City of Coalinga also are contaminated with chromium and
nickel. People who touch, accidentally ingest, or inhale contaminated air, surface
water, sediments, or soil may be at risk.
Cleanup Approach
The site is being addressed in two long-term remedial phases directed at cleanup of the surface
asbestos/mine tailings and the contamination in the City of Coalinga.
Response Action Status
Surface Asbestos/Mine Tailings: The EPA completed investigations of the
surface asbestos at the mine, the mine tailings, the ore stockpiles, and the mill in
1991. The selected remedy for the final cleanup includes diverting the stream flow
away from the mine surfaces and tailing piles by building stream diversions, minimizing the
release of sediments containing asbestos by building sediment trapping dams, stabilizing the
slopes of the waste piles by regrading and limiting access to the site by erecting fences, and
placing deed restrictions on private property at the mine area. Cleanup activities began in 1994
and are scheduled for completion in 1996.
City of Coalinga Contaminated Area: In 1989, the EPA selected a remedy to
clean up the 107 acres of contamination in the City of Coalinga. The remedy includes
excavating and consolidating approximately 20,000 cubic yards of asbestos,
chromium, and nickel-contaminated soil and building debris; building an underground waste
management unit (WMU) to contain and dispose of contaminated soil and waste on site; covering
the WMU area with an impermeable cap; regrading the excavated area; decontaminating the
debris; monitoring the soil, groundwater, and air; and implementing deed restrictions on the use
of the land. The parties potentially responsible for site contamination began cleanup activities
under EPA oversight in 1990 and completed activities in 1993.
Environmental Progress
The cleanup of the contaminated area in the City of Coalinga is complete, which protects the
public and the environment at the Atlas Asbestos site while the final cleanup of surface asbestos
and mine tailings is underway.
April 1995 2 ATLAS ASBESTOS MINE
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Site Repository
San Jose Public Library, Main Library, 180 West San Carlos Street, San Jose, CA 95113
ATLAS ASBESTOS MINE 3 April 1995
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BARSTOW M
CORPS LOGIS
BASE
CALIFORNIA
EPA ID# CA8170024264
EPA REGION 9
San Bernardino County
Barstow
Other Names:
Marine Corps Logistics Base - Nebo
Barstow USMC Logistics Base - Nebo
Site Description
The Barstow Marine Corps Logistics Base site covers 5,687 acres east of Barstow, California.
The site consists of three areas: the Nebo area; the Yermo area; and the Rifle Range. The base
was established at the Nebo location in 1942, when the U.S. Navy transferred command to the
U.S. Marine Corps. In 1946, the Yermo area was annexed by the Marines from the U.S. Army.
The Rifle Range was acquired in 1955 and was developed as a facility for the Marines to
improve their marksmanship. The Barstow base has two major functions: providing equipment
maintenance, repair, overhaul and rebuilding; and receiving, storing, maintaining, issuing, and
shipping materials. Consequently, the majority of wastes historically generated by the base have
been vehicle-related, and war surplus. Vehicle-related wastes include waste oils, grease,
hydraulic fluids, fuels, battery acids, bilge waters, and antifreeze. Industrial wastes are generated
by the Repair Division while maintaining, rebuilding, or preserving the vehicles. These include
painting, degreasing, metal parts cleaning, and preservation wastes. Some hazardous or suspected
hazardous wastes were contained in war surplus materials received at the base, including
ammunition, various sources of low-level radiation (luminescent dials, watches, and scopes), and
chemicals such as pesticides, herbicides, and raw materials. Investigations by the Marine Corps
have found 38 areas of contamination on the base. Approximately 29,000 people live in the City
of Barstow. About 1,300 people use on-site groundwater as a drinking water source.
Groundwater is the only source for domestic, commercial, and industrial water supply, as well as
crop irrigation. The base is located in the central Mojave Desert.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 11/21/89
Threats and Contaminants
Groundwater contains volatile organic compounds (VOCs) such as trichloroethylene
(TCE) and perchloroethylene (PCE). Soil is contaminated with VOCs, pesticides,
polynuclear aromatic hydrocarbons (PAHs), heavy metals, and polychlorinated
biphenyls (PCBs). People who accidentally ingest or come in direct contact with
contaminated groundwater or soil may suffer adverse health effects.
March 1995
-------
Cleanup Approach
The site is being addressed in four stages: immediate actions and three long-term remedial phases
focusing on cleanup of the groundwater, source control, and the entire site.
Response Action Status
Immediate Actions: An alternate drinking water supply has been provided for
personnel on the base. One drinking water well is being treated. Contaminated
sludges in old wastewater lagoons were excavated and treated in 1993.
Groundwater: The Marine Corps is conducting an investigation to determine the
extent and nature of contamination of the groundwater. At its completion, planned for
early 1996, recommendations for cleanup remedies will be made.
Source Control: The Marine Corps is conducting an investigation to identify
additional sources of contamination throughout the base. The study is expected to be
completed in 1996, at which time cleanup remedies will be selected.
Entire Site: An extensive investigation into the nature and extent of contamination at
the entire site began in 1990. The Marine Corps is expected to complete the study in
1997, at which time cleanup remedies will be selected.
Site Facts: The base is participating in the Installation Restoration Program, a specially funded
program established by the Department of Defense (DOD) in 1978 to identify, investigate, and
control the migration of hazardous contaminants at military and other DOD facilities.
Environmental Progress
By providing an alternate drinking water supply to base personnel, the potential for exposure to
contaminants in the groundwater has been reduced while investigations continue and final cleanup
activities are being planned for the Barstow Marine Corps Logistics Base site.
Site Repository
San Bernardino County Public Library, Barstow Branch, 304 East Buena Vista,
Barstow, CA92311
March 1995 2 BARSTOW MARINE CORPS LOGISTICS BASE
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BECKMAN
INSTRUMENTS
(PORTERVILLE PLAN
CALIFORNIA
EPA ID# CAD048645444
EPA REGION 9
Tulare County
Porterville
Site Description
The Beckman Instruments (Porterville Plant) site covers approximately 500 acres in Porterville,
California. The plant itself occupies 12 acres. The company has manufactured printed circuit
boards and electronic instruments parts at the facility since 1968. Wastes generated from these
operations included solvents, acid solutions, and heavy metals. From 1974 until 1983, these
wastes were disposed of in an evaporation pond on site. This pond is the most likely source of
groundwater contamination in the area surrounding the Beckman facility. In addition to the pond,
three other areas where wastes were dumped include the former enchant tank area, the
ammonium persulfate and copper waste discharge area (known as the soil stain area), and the
depression area. Liquids from the pond were first detected in 1978 in a leak detection sump
underlying the pond. Subsequent groundwater monitoring indicated the presence of elevated
levels of volatile organic compounds (VOCs) and heavy metals. Numerous residences are located
near the site. In addition, Porterville College is located just east of the site, and downtown
Porterville is located about 2,000 feet north of the site. A municipal water supply well lies about
500 feet northwest of the facility. Approximately 475 people live within a mile of the plant and
are affected by the contaminated groundwater.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Groundwater contains VOCs such as trichloroethylene (TCE), and Freon-113. Lead is
contaminating the soil. People who accidentally ingest or come into direct contact with
contaminated groundwater or soil may be at risk.
April 1995
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Cleanup Approach
Response Action Status
Immediate Actions: In 1983, the pond liquids, liners, and surface soils were
removed and disposed of in an EPA-approved facility. Beckman installed
groundwater monitoring wells and provided alternate water supplies to about 300
residences affected by the contamination. Between 1983 and 1985, the company connected over
150 of the affected residences to the Porterville municipal water supply system. In 1985,
Beckman installed a groundwater pump and treat system to stop the westward spread of
contaminants in the upper aquifer and to begin cleaning the groundwater. These activities helped
to slow, and eventually halt, the migration of the contaminant plume. In 1987, an eastern
containment and reclamation well field was installed. Groundwater from this area is pumped to
an on-site air stripping tower. The treated groundwater from both systems is used for local
irrigation or is diverted to percolation basins east of the facility and near the Tule River. By
January 1990, groundwater cleanup standards were achieved in the upper aquifer.
Entire Site: In 1989, the EPA selected a remedy to clean up the soils and lower
aquifer areas of the Beckman Instruments site by extracting the contaminated
groundwater, treating the groundwater by air stripping to remove the contaminants,
releasing the treated groundwater into the aquifer, and excavating the lead-contaminated soil and
disposing of it in an EPA-approved facility. In 1990, Beckman, under EPA oversight, began
designing the technical specifications for the cleanup. The design of the groundwater remedy was
completed in 1992. To date, soil cleanup has been completed and all components for the
groundwater cleanup have been constructed and are operating.
Site Facts: In 1987, the EPA and Beckman Instruments signed a Consent Order requiring the
company to clean up the site. Beckman designed cleanup technologies and is currently conducting
cleanup activities under a Unilateral Administrative Order.
Environmental Progress
All construction at the site is complete. The pump and treat system operating at the Beckman
Instruments site has been effective in reducing the levels of contamination in the groundwater.
Cleanup standards for the upper aquifer have been achieved. The soils contaminated with lead
have been removed from the site, eliminating the potential for direct exposure to hazardous
materials at the site. Cleanup of the lower aquifer at the Beckman Instruments (Porterville Plant)
is underway and will continue until established cleanup standards are achieved.
Site Repository
Porterville Public Library, 41 West Thurman Avenue, Porterville, CA 93257
April 1995 2 BECKMAN INSTRUMENTS
(PORTERVILLE PLANT)
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BROWN & BR
INC. (ARVIN PC
CALIFORNIA
EPA ID# CAD052384021
EPA REGION 9
Kern County
Arvin
Site Description
The Brown & Bryant, Inc. (Arvin Plant) covers about 5 acres in Arvin, California. The company
began operations in 1960 as a formulator of agricultural chemicals including fertilizers,
herbicides, insecticides, and fumigants. During inspections by State agencies, improper handling
and disposal of hazardous wastes at the facility have been documented. Accidental spills of
pesticides have occurred at the site. In 1979, an evaporation pond was built in the southeastern
corner of the site. This pond received pesticide rinse water and surface runoff from the site. As
the result of heavy rains, this pond has overflowed on at least two occasions. The closest public
well is located about 1,700 feet south of the site. The public water system supplies drinking water
to approximately 7,800 people and irrigates about 19,600 acres of cropland. The area
surrounding the site is industrial, agricultural, and residential. The Arvin-Edison Water District
maintains six municipal groundwater wells within 1 mile of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 10/04/89
Threats and Contaminants
Soil contains numerous pesticides such as dinoseb, ethylene dibromide and other
fumigants. The groundwater also is contaminated with pesticides. People who
accidentally ingest or come into direct contact with contaminated groundwater or soil
may be at risk.
April 1995
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Cleanup Approach
The site is being addressed in three stages: interim actions and two long-term remedial phases
focusing on cleanup of the entire site and the area-wide ground water.
Response Action Status
Interim Actions: In 1988, under State supervision, Brown & Bryant, Inc.,
excavated the heavily contaminated soil under the pond and installed a liner. An
additional removal of dinoseb-contaminated soil was conducted in 1991. The
excavated soil was cleaned, treated, and returned to the ground. The water used to clean the soil
was treated by an innovative technology called ultraviolet/ozone. This process uses special
ultraviolet lights and ozone gas to break down hazardous chemicals. In addition, more monitoring
wells were installed to detect any contaminants migrating to the Arvin Municipal wells and to
monitor the perched water plume.
Entire Site: The EPA began an investigation in 1990 to develop a long-term
solution to the groundwater and soil contamination problems. A remedy was selected
in 1993 that includes consolidation of contaminated soil, installation of a cap over the
consolidated soil, and extraction and treatment of water from the first water-bearing unit. Design
of the remedies is scheduled to be completed in the spring of 1995.
Area-Wide Groundwater: An investigation to explore the nature and extent of the
area-wide groundwater contamination is scheduled to be completed in 1997. Once the
investigation is completed, alternative cleanup options will be recommended.
Site Facts: Under orders from the State, Brown & Bryant, Inc., conducted a limited
investigation of the site and removed some of the contaminated soil. However, in 1989, the firm
went out of business, leaving the EPA and the State to solve the remaining contamination
problems.
Environmental Progress
The removal and treatment of the heavily contaminated soil has reduced the potential for
exposure to hazardous materials while the EPA and the State are planning additional cleanup
actions at the Brown & Bryant, Inc. (Arvin Plant) site.
Site Repository
Kern County Library, 123 A Street, Arvin, CA 93203
April 1995
BROWN & BRYANT, INC. (ARVIN PLANT)
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CAMP PENDLET
MARINE CORPS
CALIFORNIA
EPA ID# CA2170023533
EPA REGION 9
San Diego County
Other Names:
Marine Corps Base Camp Pendleton
Camp Pendleton PCB Spill
Site Description
The Camp Pendleton Marine Corps Base site covers 125,000 acres in San Diego County,
California. The base provides housing, training, and logistical and administrative support for the
Fleet Marine Force units. Past disposal practices have contaminated the groundwater and soil. In
an initial investigation, the Marine Corps found nine areas of contamination. Waste generation
operations at this site include maintenance and repair of vehicles (trucks, tanks, and aircraft);
landfill operations; waste disposal areas, such as scrap yards; and firefighting drill areas. The
base contains wetlands, streams, and rivers, which feed into the Pacific Ocean. This land is the
only remaining undeveloped area between Los Angeles and San Diego.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 11/21/89
Threats and Contaminants
Groundwater and soils are contaminated with volatile organic compounds (VOCs),
spent oils, fuels, polychlorinated biphenyls (PCBs), pesticides, metals and herbicides.
Though groundwater provides drinking water to the entire installation, the current
drinking water supply is within drinking water standards.
Cleanup Approach
The site is being addressed in four long-term remedial phases focusing on cleanup of soils;
landfills, surface impoundments, and groundwater; other soils and groundwater; and remaining
areas.
April 1 995
-------
Response Action Status
Soils: In 1990, the Marine Corps began an investigation to determine the nature and
extent of contamination of the soil and groundwater at six subsites where data were
already available. The investigations were completed in the fall of 1993, and final
cleanup measures are scheduled to be selected in 1995.
Landfills, Surface Impoundments, and Groundwater: In 1990, the Marine
Corps began an investigation of the nature and extent of contamination in the landfills,
surface impoundments, and groundwater. Final cleanup measures are expected to be
Other Soils and Groundwater: In 1990, the Marine Corps began an investigation
into the nature and extent of contamination of soils and groundwater on the base
located in the Santa Margarita watershed, where data are not yet available. The
investigation is scheduled to be completed in 1995, after which the final cleanup remedy for these
areas will be selected.
Remaining Areas: An investigation of the nature and extent of soil and groundwater
contamination in subsites outside the Santa Margarita watershed on the base is
scheduled to begin in 1995.
Site Facts: Camp Pendleton is participating in the Installation Restoration Program, a specially
funded program established by the Department of Defense (DOD) in 1978 to identify, investigate,
and control the migration of hazardous contaminants at military and other DOD facilities.
Environmental Progress
After listing the site on the NPL, preliminary investigations showed that no immediate actions are
required at the Camp Pendleton Marine Corps Base while investigations are being completed.
Site Repository
Oceanside Public Library, 330 North Hill Street, Oceanside, CA 92054
April 1995 2 CAMP PENDLETON MARINE CORPS BASE
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CASTLE AIR
FORCE BASE
CALIFORNIA
EPA ID# CA3570024551
EPA REGION 9
Merced County
Atwater
Site Description
The Castle Air Force Base site comprises 2,777 acres and is adjacent to Atwater, California. This
installation originally was used as an aircrew training facility by the Army in 1941. The Strategic
Air Command assumed responsibility for the base in 1946. Since the mid-1940s, aircraft
maintenance, fuel management, and fire training activities on the base have generated wastes that
consist primarily of waste fuels, oils, solvents and cleaners. Base activities also have generated
lesser amounts of paints and plating wastes. Bulk wastes such as solvents, oils, fuels, and sludges
were disposed of by the Air Force in pits at landfills around the base until 1977. Fuel and waste
oils were incinerated by the Air Force during fire training exercises. The Air Force ceased
disposal of hazardous waste on site in 1977, and there is only one remaining active landfill on the
base. Investigations are proceeding at multiple areas of contamination including landfills,
discharge areas, chemical disposal kits, fire training areas, fuel spill areas and polychlorinated
biphenyl (PCB) spill areas. An estimated 12,210 persons work at the base. The primary base
housing area is Castle Gardens, located immediately to the southwest of the base. Approximately
6,000 people obtain their drinking water from both municipal and private wells located near the
site.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Shallow groundwater in the Main Base and the North, East, and West Flightline areas
is contaminated with trichloroethylene (TCE) and benzene. Soils in the Main Base, the
East Sector, and the West Flightline Sectors are contaminated with volatile organic
compounds (VOCs) including toluene, ethyl benzene, and xylene. Off-base housing
areas are contaminated with low levels of VOCs. Base employees and residents could
be exposed to contaminants by accidentally ingesting or coming into direct contact
with contaminated soil. Because groundwater is used by local farmers to irrigate
crops, area residents also could be exposed to airborne concentrations of TCE in
dusts, and contaminants bioaccumulated in area produce.
May 1995
-------
Cleanup Approach
The site is being addressed in five stages: immediate actions, one interim action concerning the
shallow aquifer, and three long-term remedial phases focusing on cleanup of Disposal Area-4 and
Wallace Road, the off-base groundwater and sub-shallow aquifers, and the entire base.
Response Action Status
Immediate Actions: The Air Force installed two deep wells in 1988 to replace
TCE-contaminated water supplies: one for the City of Atwater and one to meet on-
base needs. In 1989, the Air Force also built a granular activated carbon filtration
system to treat TCE-contaminated groundwater. Prior to the installation of these filters, the Air
Force supplied area residents with bottled water. The Air Force began removing
TCE-contaminated materials from Disposal Area-4 and Wallace Road, a residential area, in 1991.
Contaminated groundwater from these two areas is being pumped and treated using carbon
adsorption. The treated groundwater is being discharged into Casad Lateral Canal. Cleanup
activities are scheduled for completion in 1995.
Shallow Aquifer: In 1991, an investigation into the nature and extent of
contamination of the shallow aquifer was completed and an interim cleanup action
was selected. A pump and treat system to address groundwater contamination was
built in 1993. The cleanup is scheduled to last through 1999.
Disposal Area-4 and Wallace Road: The investigation to determine the nature
and extent of contamination at Disposal Area-4 and Wallace Road, a residential area,
was completed in 1993. The selected remedy calls for pumping and treating
contaminated groundwater. Construction of the pump and treat plant began in March 1995, and is
expected to be completed in the fall of 1995.
Off-Base Groundwater and Sub-Shallow Aquifers: The investigation to
determine the nature and extent of contamination in the off-base groundwater and
sub-shallow aquifers is underway. The investigation is scheduled to be completed in
Entire Base: The study into the nature and extent of contamination at the base and
the most effective methods for addressing it began in 1989. The base-wide
investigation is scheduled to be completed in 1996.
Site Facts: Castle Air Force Base is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities. The site has been placed on the Base Closure List. It is expected to be closed within the
next 5 years.
May 1995 2 CASTLE AIR FORCE BASE
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Environmental Progress
By supplying the on-base and local residents affected by groundwater contamination with a safe
drinking water supply, installing a groundwater filtration system, and removing contaminated
materials, the Air Force has reduced the potential for exposure to hazardous materials while
extensive investigations into the areas of contamination at the Castle Air Force Base site are
taking place and further cleanup activities are being planned.
Site Repository
Merced County Library, Central Branch, 2100 O Street, Merced, CA 95430
CASTLE AIR FORCE BASE
May 1995
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CELTOR
CHEMICAL
CALIFORNIA
EPA ID# CAD980638860
EPA REGION 9
Humboldt County
Hoopa
Other Names:
Hoopa Valley Indian Reservation
Site Description
The 2-acre Celtor Chemical Works site, located in the northern Hoopa Valley Indian Reservation,
is a former ore concentrating facility that processed sulfide ore for copper, zinc, and precious
metal extraction. The Hoopa Valley Indian Tribe, the site's owner, leased the land in 1958 to the
Celtor Chemical Corporation. From 1958 until 1962, copper, zinc, and precious metals were
recovered on site from sulfide ore mined and trucked to Celtor from the nearby Copper Bluff
Mine. In 1962, Celtor Chemical Corporation abandoned the site and mine tailings generated from
the milling operations were left on site. These tailings, along with non-specific releases of
processed ore, were thought to be the cause of the acidic surface water runoff and elevated
metals concentrations in the soils throughout the site. The site consists of the plant, an adjacent
pasture used for grazing livestock, a gully connecting the plant and the Trinity River, a drainage
creek that collects surface runoff and carries it into the Trinity River, and a fishing access road
that is frequently used by local residents. There are approximately 900 people living within 3
miles of the site. The Trinity River, which supports the only fish resources for the Hoopla
Indians, flows through the center of the reservation and near the site.
Site Responsibility: This site was addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Soil was contaminated with heavy metals including arsenic, copper, lead, cadmium,
and zinc. Potential health threats to people included accidental ingestion or inhalation
of contaminated soil and dust generated by wind.
April 1995
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Cleanup Approach
Response Action Status
Immediate Actions: In 1983, the EPA excavated several hundred cubic yards of
visibly contaminated materials. This material included tailings, non-concrete
structures, and a portion of the pasture adjacent to the site. The main portion of the
site was fenced, and the access road was covered with gravel. The flow of several springs was
diverted away from the contaminated areas and into a nearby creek, which emptied into the
Trinity River.
Entire Site: In mid-1987, the EPA selected a remedy to clean up the Celtor
Chemical Works site. From 1987 to 1989, the EPA excavated an additional 1,400
cubic yards of contaminated soils from the site and disposed of them off site at an
EPA-approved hazardous waste disposal facility. All site cleanup activities have been completed,
and the process for deleting the Celtor Chemical Works site from the NPL has been initiated.
Environmental Progress
The EPA has completed all actions for the cleanup of contamination at the Celtor Chemical
Works site. The EPA, in conjunction with the State, has determined that the site has now meets
human health and environmental goals and currently is in the process of deleting the site from the
NPL. Monitoring will continue to ensure the long-term effectiveness of the remedies.
Site Repository
Bureau of Indian Affairs, Looped Road, Room 102, Hoopa, CA 95546
April 1995 2 CELTOR CHEMICAL WORKS
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COALINGA
MINE
CALIFORNIA
EPA ID#CAD980817217
EPA REGION 9
Fresno County
17 miles northwest of Coalinga
Other Names:
Johns-Manville Asbestos Company
Southern Pacific Land
Company/Coalinga
Arroyo Pasajero Regional Asbestos
Study
Site Description
The Coalinga Asbestos Mine site covers 557 acres near Coalinga. The mill was operated by the
Coalinga Asbestos Company as a joint venture between the Johns-Manville Sales Corporation, the
Kern County Land Company, and private investors from 1962 to 1974, when the mill property
reverted to the Southern Pacific Land Company (SPLC). SPLC leased the facility to the Marmac
Resource Company for chromite mining in 1975. All operations ceased in 1977. The site consists
of partially demolished mill buildings and a process waste mine tailings pile that occupies about
20 acres. Two large open-pit mines are located above the mill site and were used as the sources
of ore for the Coalinga Asbestos Company milling operations. While the mill was operating,
some milling and mining products from Coalinga and from the Atlas Asbestos Mine, located
about 3 miles away, were transported to the City of Coalinga. Because these two mines
contributed to the contamination of a 107-acre area in Coalinga, the contamination in Coalinga is
also being cleaned up. (For additional information, please see the separate listing for Atlas
Asbestos Mine site.) The area surrounding the Coalinga Asbestos Mine is primarily rural. The
land is used for ranching, farming, and recreational activities such as hunting. About 10 ranchers
live within 5 miles of the site. The closest community is Coalinga, located approximately 14
miles away. The town has a population of approximately 8,000 people.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 09/21/84
Threats and Contaminants
—
zc
Air, soils, sediments, and surface water contain asbestos. People who come into direct
contact with, accidentally ingest, or inhale contaminated surface water, sediments,
soil, or air may be at risk.
April 1 995
-------
Cleanup Approach
The site is being addressed in two long-term remedial phases directed at cleanup of the Coalinga
Asbestos Mines and the City of Coalinga contaminated area.
Response Action Status
Coalinga Asbestos Mines: Under EPA supervision, the parties potentially
responsible for contamination at the Coalinga Asbestos Mines investigated the nature
and extent of contamination. The cleanup remedy, selected in 1991, includes diverting
the stream flow away from the tailings pile by building a cross-canyon stream diversion,
minimizing the release of asbestos into a nearby creek by improving the existing sediment
trapping dam, paving the road through the Mill Area to suppress dust, dismantling the mill
building and disposing of the debris, and limiting access to the site by erecting a fence and
placing deed restrictions on the property. The design of the remedy was completed in early 1994
and cleanup activities are scheduled to be completed in the fall of 1995.
City of Coalinga Contaminated Area: In 1989, the EPA selected a remedy to
clean up the 107 acres of contamination in the City of Coalinga that resulted from the
Atlas and Coalinga asbestos mines. The remedy includes: excavating and
consolidating approximately 20,000 cubic yards of asbestos, chromium, and nickel-contaminated
soil and building debris; building an underground waste management unit (WMU) to contain and
dispose of contaminated soil and waste on site; covering the WMU area with an impermeable
cap; regrading the excavated area; decontaminating the debris; monitoring the soil, groundwater,
and air; and implementing deed restrictions on the use of the land. The parties potentially
responsible for site contamination began cleanup activities in late 1989, under EPA oversight.
While cleanup activities have been completed, implementation of a deed restriction which was
filed by a potentially responsible party is still under consideration.
Environmental Progress
The excavation and disposal of contaminated soil and debris and covering of the WMU with a
cap in the City of Coalinga have reduced the health risk to residents while final cleanup of the
Coalinga Asbestos Mine is underway.
Site Repository
Coalinga District Library, 305 North 4th Street, Coalinga, CA 93210
April 1995 2 COALINGA ASBESTOS MINE
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COAST WOO
PRESERVING
CALIFORNIA
EPA ID# CAD063015887
EPA REGION 9
Mendocino County
3 miles south of Ukiah
Site Description
Coast Wood Preserving is an 8 acre, active wood treatment facility located 3 miles south of
Ukiah. Since 1971, the Coast Wood Preserving facility has used a solution of sodium dichromate,
copper sulfate, and arsenic acid to pressure-treat and preserve wood products. Over the years of
operation, dripping and spillage of this chemical solution have contaminated soil and groundwater
on and off site. The Town of Ukiah has a population of approximately 13,300 people. There are
two duplexes, two bunk houses, and six motel units located within 1/2 mile of the site. The motel
units are used to house seasonal workers at a nearby packing facility. The land near the site is
used for timber-related purposes, sewage treatment, pear orchards, and business and commercial
facilities. The groundwater in the area supplies municipal, domestic, and agricultural water.
Portions of the site are located over two streams 1/2 mile upstream from where they meet the
Russian River. The river also supplies municipal, domestic, and agricultural water.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Groundwater and soils are contaminated with heavy metals including chromium,
arsenic, and copper. Drinking or coming into direct contact with on- and off-site
runoff and contaminated groundwater used for drinking or agricultural purposes may
pose a threat to human health. Since the areas of contaminated soil are covered with
pavement, no direct contact with contaminated soil is expected. Public access to the
site is prevented by a security fence that is locked after business hours.
April 1995
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Cleanup Approach
The site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1983, Coast Wood Preserving, under EPA oversight,
began pumping out the contaminated groundwater plume and storing it on site.
Subsequently, the company built a slurry wall and an interceptor trench to prevent
the off-site migration of contaminated groundwater. A groundwater extraction well was installed
to pump the contaminated groundwater, and an injection well, where Coast Wood Preserving
injected treated water, was built downgradient from the site. Other activities included grading and
building berms to prevent surface water runoff from the operations area.
Entire Site: The selected cleanup remedy to address soil and groundwater
contamination included: paving over soils to prevent water penetration, treating
contaminated soils on site by fixating them with cement after closure of the site,
implementing deed restrictions on future use of the site property, controlling the groundwater
plume through pumping and treating, and monitoring groundwater on a continuous basis. The
groundwater cleanup system is operating and will continue until established cleanup goals are
met. All other cleanup activities were completed began in early 1990.
Site Facts: In 1981, the North Coast Regional Water Quality Control Board issued an order
requiring Coast Wood Preserving to establish measures to stop the release of toxic waste. Later
that year, the company was referred to the Board for violation of the order. The Court
subsequently issued an injunction, requiring that the company perform the site cleanup. It was
later determined that Coast Wood Preserving was not complying with the injunction.
Environmental Progress
Groundwater extraction and treatment, and construction of a slurry wall and berms have been
effective in controlling the spread of groundwater contamination, thereby reducing the potential
for exposure to hazardous materials. The remedies for final soil cleanup at the Coast Wood
Preserving site were completed in early 1990. Groundwater treatment will continue until
established cleanup goals are met.
Site Repository
Contact the Region 9 Superfund Community Relations Office.
April 1995 2 COAST WOOD PRESERVING
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CONCORD N
WEAPONS ST
CALIFORNIA
EPA ID#CA7170024528
EPA REGION 9
Contra Costa County
Concord
Site Description
Concord Naval Weapons Station (CNWS) is a 12,800-acre site located in the north-central
portion of Contra Costa County. CNWS is composed of 12,800 inland and tidal areas and a
radiology facility in Pittsburg, California. Aside from typical administrative and support work
activities, this facility is the major ammunition transshipment port on the West Coast for the
Department of the Navy. Transshipment operations are conducted on the 7,630-acre wetlands
bordering Suisun Bay, commonly called the Tidal Area. Wastes generated from base operations
have been disposed of in the Tidal Area since base operations began in 1942. Naval
investigations of the site have identified 32 areas potentially containing hazardous substances. The
investigations are focusing primarily on six areas located within the Tidal Area. These six areas
are: the Tidal Area Landfill, the R-Area Disposal Site, the Wood Hogger Site, Allied Sites A and
B, the Kiln Site, and the K-2 Area. The Tidal Area Landfill, the R-Area Disposal Site, and the
Wood Hogger Site are wetlands in the western tidal area. Contamination of these areas comes
from on-base waste disposal practices, 3,000 tons of mixed wastes that have been deposited since
the 1940s, material and waste generated during the segregation of conventional munitions, and
chipped wood contaminated with pentachlorophenol (PCP). Investigations identified volatile
organic compounds (VOCs) and heavy metals to be the primary contaminants in these areas.
Allied Sites A and B, the Kiln Site, and the K-2 Area are wetlands in the eastern tidal area.
These areas were contaminated as a result of private industrial activities and were subsequently
purchased by the Navy to create a buffer zone for base operations. Soil sampling that took place
in 1986 detected heavy metals in these areas. High tides have inundated the sources, carrying
contaminants to Suisun Bay. Other potential areas of concern at the station include the Froid and
Taylor Road Disposal Area, the Black Pit at Red Rock Site, and the G-l Site. The contaminated
areas are critical habitats for the salt mash harvest mouse, an endangered species. The black
clapper rail, also an endangered species, inhabits wetlands adjacent to the site. Suisun Bay
supports extensive commercial and recreational fishing.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL Listing History
Proposed Date: 02/07/92
June 1995
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Threats and Contaminants
Soil, sediments, and surface water are contaminated with VOCs and heavy metals
including zinc, copper, lead, cadmium, and arsenic. Ingesting or coming into direct
contact with contaminated soil, sediments, or surface water may pose a potential
health threat. Area wetlands, and the salt marsh harvest mouse and the black capper
rail, endangered specisies, are at risk.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: Since 1983, CNWS has excavated contaminated soils and
disposed of them offsite. In addition, CNWS performed wetlands restoration
activities. Excavation on some additional portions of the site were completed in the
fall of 1994. Replanting of the site is scheduled for completion in 1995.
Entire Site: Investigations to determine the source of contamination and the nature
and extent of contamination at the entire site are underway. Cleanup remedies will be
determined upon completion of the investigations.
Site Facts: CNWS is participating in the Installation Restoration Program, a specially funded
program established by the Department of Defense (DOD) in 1978 to identify and investigate
military and other DOD facilities.
Environmental Progress
Initial actions such as wetland restoration and excavation of contaminated soils are protecting
nearby populations and the environment while investigations are ongoing at the CNWS site.
Site Repository
Contra Costa County Library, Main Branch, 1750 Oak Park Blvd., Pleasant Hill, CA 94523
June 1995 2 CONCORD NAVAL WEAPONS STATION
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COOPER DRU
CALIFORNIA
EPA ID# CAD055753370
EPA REGION 9
Los Angeles County
South Gate
Site Description
Since 1941, Cooper Drum Co. has reconditioned closed-topped, steel drums that previously held
a variety of industrial chemicals. The 4-acre facility is bordered by industrial properties on the
north and east, mixed commercial/residential properties on the west, and a former elementary
school (Tweedy Elementary School) on the south. The Cooper Drum Co. property is primarily a
paved area composed of storage areas for used and reconditioned drums; a drum processing area;
and office, maintenance, and warehouse buildings. In April 1987, the Los Angeles County Health
Department (LACHD) Emergency Response Team responded to an incident at the Tweedy
Elementary School property. An unknown quantity of highly caustic liquid waste had migrated
via underground seepage from the Cooper Drum Co. property. The waste resulted from the
caustic wash water from the drum recycling process line located in the building directly north of
the school property. Initially, the waste was thought to comprise mainly sodium hydroxide and
oil. When contamination migrated onto school property, the top layer of soil was excavated and
the area was paved. Due to public health concerns, Tweedy Elementary School has remained
closed. In 1987, the City of South Gate also closed four municipal wells due to volatile organic
compound (VOC) contamination. These four wells are located between 500 and 1,500 feet
downgradient of Cooper Drum Co. and draw water from the Silverado Aquifer, approximately
600 feet below the ground surface. Contamination of these wells cannot be attributed solely to
Cooper Drum Co. at this time because there are other potential sources of VOC contamination in
the vicinity. However, evidence suggests that the shallow aquifer and the lower Silverado Aquifer
are hydraulically connected, allowing the water to move between them. In 1990, an analysis of
samples from on-site monitoring wells documented VOC contamination. Municipal wells located
within 4 miles of the site supply drinking water to approximately 335,000 people; the nearest of
these wells is located within 1/2 mile of the site. An estimated 340,000 people live within 4 miles
of the site. The Cooper Drum Co. was sold to a new drum company in 1992, which employs 50
on-site workers.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL Listing History
Proposed Date: 02/07/92
April 1995
-------
Threats and Contaminants
On-site soil is contaminated with VOCs. Shallow groundwater is contaminated with
VOCs including vinyl chloride and benzene. Tanks and sludge pits in the drum
processing area are exposed to the air, potentially allowing gases and particles to be
released. Coming into contact with or ingesting contaminated soil and groundwater
may pose a potential health threat. Sensitive environments are located within 3 miles
of the site.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In April of 1987, contaminated soil at Tweedy Elementary
School was excavated, the area was paved, and the school was closed. The City of
South Gate closed four municipal wells in the same year. In mid-1987, Cooper
conducted an analysis of on-site soil samples and detected VOCs to depths of 30 feet. In 1990,
Cooper drilled three monitoring wells to determine the extent of contamination in shallow
groundwater beneath the site.
Entire Site: The EPA initiated an investigation into the nature and extent of
contamination at the site in 1993. This investigation will result in the selection of
remedies for the final cleanup of the site.
Environmental Progress
The immediate actions taken to excavate contaminated soils at Tweedy Elementary School and the
closure of the school have reduced threats to public health while further investigations at the
Cooper Drum Co. site are ongoing.
Site Repository
Not established.
April 1995
COOPER DRUM CO.
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CRAZY HORSE
SANITARY LAN
CALIFORNIA
EPA ID# CAD980498455
EPA REGION 9
Monterey County
Salinas
Site Description
The 125-acre Crazy Horse Sanitary Landfill site has operated as a sanitary landfill since 1950.
Prior to 1950, the site was used as an open burning dump for approximately 20 years. The
landfill is owned by the City of Salinas and is operated by Salinas Disposal Services. The facility
currently receives approximately 162,000 tons of refuse a year and is expected to remain in
operation until at least 1999. In 1977, the landfill received a permit from the State allowing it to
accept various wastes. Some pesticide containers have been disposed of at the facility.
Reportedly, from the early 1970s to 1982, the Firestone Tire & Rubber Company disposed of
large quantities of waste on the site from its vulcanizing process, which included rubber, carbon
black and other fillers, oils, and mixed solvents. This material consisted of wastes containing
mainly benzene and toluene. In 1987, off-site properties with contaminated wells were purchased
by the City of Salinas in 1987. Since 1987, Pacific Energy has operated and maintained a gas
collection system and an electric generation plant on the site. Land surrounding the site is used
for residential and agricultural purposes. Approximately 6,200 people obtain drinking water from
private wells located within 3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal, Municipal, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 08/30/90
Threats and Contaminants
Air and groundwater on site are polluted with volatile organic compounds (VOCs).
Potential health threats include ingesting, coming into direct contact with, and inhaling
contaminated groundwater and groundwater vapors. Concentrations of contaminants in
the air are not high enough to pose a significant health threat.
April 1995
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Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: Approximately 6 acres of the landfill were closed in 1988 and
covered with a high-density, polyethylene membrane and 2 feet of soil. Dewatered,
digested, sewage sludge was placed on top of the area to promote revegetation. The
southeastern edge of the area was lined with bales of straw to retard surface water runoff. The
City also pumped water from wells in an attempt to stabilize the groundwater contamination. Six
extraction wells initially were installed as an interim measure, followed by the installation of 17
additional wells to completely capture the migrating plume. Adjacent residential wells were either
permanently sealed or converted into extraction or monitoring wells. Contaminated water was
pumped from the extraction wells and treated by air stripping. Treated water is stored in
collection tanks and then either reinjected into the ground through 27 recharge wells or used for
dust control.
Entire Site: EPA is reviewing the effectiveness of the initial actions to determine
whether additional cleanup measures are needed. This review is scheduled for
completion in the fall of 1995.
Environmental Progress
Covering portions of the landfill and treating the groundwater have reduced the potential of
exposure to contaminated materials at the Crazy Horse Sanitary Landfill site while investigations
are being completed.
Site Repository
State of California CRWQCB, Central Coast Region, 82 Higuera Street, Suite 200, San Luis
Obispo, CA 93401-5414
April 1995 2 CRAZY HORSE SANITARY LANDFILL
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CIS PRINTE
CALIFORNIA
EPA ID# CAD009212838
EPA REGION 9
Santa Clara County
Mountain View
Site Description
From 1966 to 1985, CIS Printex, Inc. manufactured printed circuit boards on a 5 1/2-acre site.
The facility used a wet and dry process to manufacture the circuit boards. The wet process
occurred in the "wet-floor" building, where process water containing heavy metals and volatile
organic compounds (VOCs) was discharged to the floor drains and ultimately into a neutralization
sump. The plant received a license from the City of Mountain View that allowed the sump to
discharge into the City's sewer system. The facility also generated other waste solvents that were
disposed of off-site. Data from environmental monitoring show that the soils under the "wet-
floor" were contaminated with copper and lead. Also, groundwater on and off site was
contaminated with VOCs and heavy metals from discharges to the "wet-floor" and the
neutralization sump. Approximately 61,000 people live in the City of Mountain View. More than
188,000 people live within 3 miles of the site and use groundwater from municipal wells as a
source of drinking water. Permanente Creek is located 400 feet from the site. This creek and all
surface water in the area discharge into the San Francisco Bay, which is located 21/2 miles
north of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/22/90
Threats and Contaminants
Groundwater on and off site contains VOCs and heavy metals including lead and
copper. Soils on site are contaminated with lead and copper. People who worked in
the "wet-floor" building may have been exposed to hazardous chemicals if they
inhaled gases from the contaminated soils under it, especially in a confined space. The
building has since been decontaminated and the soils have been excavated, thereby,
eliminating this threat.
April 1995
-------
Cleanup Approach
Response Action Status
Immediate Actions: In 1986, CIS Printex, Inc. excavated 255 cubic yards
of soil under the building, decontaminated the building, and sent the wastes to an
EPA-approved storage facility for hazardous wastes. The company also excavated the
neutralization sump between 1985 and 1986 and backfilled the area with gravel, clay, and
asphalt. One off-site and three on-site extraction wells have been pumping groundwater since
1987 and discharging it into Mountain View's sanitary sewer system for treatment. Three
additional off-site extraction wells began pumping in 1989.
Entire Site: In 1991, under the State's oversight, CTS Printex, Inc. completed an
investigation into the nature and extent of site contamination. As a result of the
investigation, the EPA decided to continue treating groundwater through the existing
extraction system until established cleanup goals are met. Water will continue to be discharged
into Mountain View's sanitary sewer system after treatment. Operation and maintenance of the
system is expected to continue through 1999.
Site Facts: In 1987 and 1989, the California Regional Water Quality Control Board issued
Cleanup and Abatement Orders requiring the company to be more expeditious and thorough in
meeting its schedule for cleaning up the site.
Environmental Progress
All construction at the site is complete. The excavation and disposal of contaminated soil, the
excavation of the neutralization sump, and the operation of the groundwater extraction system
have reduced the potential for exposure to contaminated materials at the CTS Printex, Inc. site
while groundwater treatment activities continue.
Site Repository
Regional Water Quality Control Board
San Francisco Bay Region
2101 Webster Street, Suite 500
Oakland, CA 94612
April 1995 2 CTS PRINTEX, INC.
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DEL AMO FAC4ECEZ
CALIFORNIA
EPA ID# CAD029544731
EPA REGION 9
Los Angeles County
12 miles south of the City of Los
Angeles
Site Description
From 1943 until the mid-to-late 1960s, the Del Amo Facility site was a center of large-scale
industrial activities. Built by the U.S. Government to produce synthetic rubber during World
War II, the 270-acre site consisted of a styrene plant operated by Dow Chemical Co., a butadiene
plant operated by Shell Oil Co., and a synthetic rubber plant operated by U.S. Rubber Co.,
Goodyear Tire & Rubber Co., and others. Synthetic rubber was produced by manufacturing
styrene and butadiene separately, piping them to the rubber plant, and then mixing the two
together. Within each facility, wastes from the production processes were directed into separator
units. Settled sludge from the separator units was disposed of either off site or in a waste disposal
area located on site. Six unlined pits and three unlined evaporation ponds made up the 4-acre
on-site disposal area. Outflowing waste from the separator units was released into a flood control
channel located 1/2 mile away from the site. Upon closure in the mid-to-late 1960s, the unlined
pits and ponds were covered with soil. Most of the 270-acre facility has since been developed as
an industrial park. In 1984, contamination was discovered in the disposal area and underlying
soils. Groundwater located beneath the site is threatened because of the permeable nature of the
soil. This drinking water source supplies 34,000 people located within 4 miles of the site. Today,
the 4-acre disposal area is vacant and overgrown with weeds. The Del Amo Facility is bounded
to the north by residences and to the west, north, and east by industrial and commercial facilities.
Approximately 17,600 people live within 1 mile of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL Listing History
Proposed Date: 07/29/91
Threats and Contaminants
Groundwater and soils are contaminated with volatile organic compounds (VOCs),
including benzene and toluene, and polynuclear aromatic hydrocarbons (PAHs).
Floating product, including benzene and petroleum, also has been identified on top of
the water table at the site.
April 1995
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Cleanup Approach
This site is being addressed in two long-term remedial phases focusing on cleanup of the disposal
pit area and the entire site.
Response Action Status
Disposal Pit Area: In 1992, the potentially responsible parties began an
investigation to determine the nature and extent of contamination and alternative
cleanup remedies for the 4-acre disposal pit. This investigation is scheduled to be
completed in late 1995, at which time cleanup remedies will be determined.
Entire Site: In 1992, under EPA oversight, the potentially responsible parties began
an investigation into the nature and extent of contamination at the entire site. This
investigation, scheduled to be completed in early 1996, will recommend cleanup
remedies for the entire site.
Site Facts: Two potentially responsible parties, Shell Oil Co. and Dow Chemical Co., have
signed an Administrative Order on Consent agreeing to perform an investigation of the
4-acre disposal pit area. They will also conduct an investigation of the entire 270-acre site. A
health clinic for community members has been established with an Agency for Toxic Substances
and Disease Registry (ATSDR) grant near the Del Amo Facility and Montrose Chemical Corp.
sites. The clinic will test residents for exposure to chemicals such as benzene and DDT to
determine if a link exists between the sites and residents' health effects. The clinic opened for
residents in January 1995 and is scheduled to run for three years. Workgroups made up of health
officials, community members, and physicians will ensure that the clinic continues to meet the
needs of the community.
Environmental Progress ^f-
After initial investigations were conducted by the State of California, the EPA determined that the
site poses no immediate threat to human health or the environment, while site investigations are
underway.
Site Repository
Carson Public Library, 151 East Carson Street, Carson, CA 90745
April 1995 2 DEL AMO FACILITY
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DEL NORTE
PESTICIDE
STORAGE
CALIFORNIA
EPA ID# CAD000626176
EPA REGION 9
Del Norte County
1 mile northwest of Crescent City
Other Names:
Del Norte County
Department of Agriculture
Del Norte County Airport
Site Description
The Del Norte County Pesticide Storage Area site operated from 1970 until 1981, accepting
containers from local agricultural and forestry related industries. The site was intended to be an
interim or emergency storage area for pesticide containers, which previously had been
triple-rinsed and punctured. Wastes and rinse water were improperly disposed of in an unlined
sump. Approximately 1,600 drums that had held the wastes and rinse water were recovered and
recycled by the County Agricultural Department. This site is bordered by the Pacific Ocean,
State-owned land, residences, and farmland. Private wells supply the domestic water to the area,
and four wells are located within 2,500 feet of the site. Approximately 250 people live within
1 mile of the site.
Site Responsibility: This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 09/21/84
Threats and Contaminants
Groundwater and soil were found to be contaminated with various
pesticides/herbicides and volatile organic compounds (VOCs). Coming into direct
contact with or accidentally ingesting contaminated soil or groundwater may pose a
potential threat to human health.
June 1995
-------
Cleanup Approach
Response Action Status
Immediate Actions: In 1987, the EPA removed 300 cubic yards of contaminated
soils that were considered to be the source of groundwater contamination. An air
stripping groundwater treatment system was built in 1989 and has been successfully
stripping the pesticide DCP from the groundwater prior to discharge to the municipal waste
treatment system. The groundwater system has been operating dependably with daily oversight
conducted by county representatives since 1990. In 1991, operations temporarily were halted as
workers repaired a discharge pipe that had been damaged from freezing conditions.
Entire Site: In 1985, the EPA selected a cleanup remedy for the entire site that
included: excavation and off-site disposal of the remaining contaminated soils from the
sump and trench areas; extraction of contaminated groundwater; treatment of
contaminated groundwater by coagulation and sand filtration technologies; piping of treated
groundwater to the county sewer main; and groundwater monitoring. Since the concentration of
pesticides fell after the removal of the source of contamination, high rainfall rates, volatilization,
and biodegradation, the EPA decided to stop treating the contaminated groundwater with
coagulation and filtration. Instead, groundwater treatment continues through air stripping
techniques initiated in 1990. Although initial cleanup actions were thought to be completed in the
spring of 1992, the lack of contaminant reduction in the groundwater during the treatment in
1992 and 1993 led the EPA to install a pumping well and an air injection system in 1994. As of
1995, approximately 15 million gallons of contaminated groundwater had been treated and
discharged.
Environmental Progress
The removal of contaminated soils and the installation and operation of the groundwater treatment
system at the Del Norte Pesticide Storage site have reduced the potential for exposure to
contaminated materials. All construction at the site is complete.
Site Repository
Del Norte County Library District, 190 Price Mall, Crescent City, CA 95531
June 1995 2 DEL NORTE PESTICIDE STORAGE
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EDWARDS Al
FORCE BASE
CALIFORNIA
EPA ID# CA1570024504
Site Description
EPA REGION 9
Kern County
Near Lancaster
Other Names:
Edwards AFB Rocket Engine Test Area
Edwards Air Force Base, which is used for aircraft research and development, covers
approximately 301,000 acres. The Main/South Base at the western edge of Rogers Dry Lake is
primarily used for maintaining and refueling aircraft. Large amounts of fuel have been spilled
and poor disposal practices have resulted in the release of volatile organic compounds (VOCs) to
the ground. Other contaminated areas include an abandoned sanitary landfill containing heavy
metals and an area where electroplating wastes were dumped. The North Base, located 5 miles
northeast of the Main Base area, has a drum storage site at the northern end of Rogers Dry Lake
and three unlined surface impoundments where wastes were poured during the 1960s and 1970s.
A total of eight areas are being studied to confirm the presence of contaminants. The 13,800
employees at Edwards Air Force Base obtain drinking water from wells located within 3 miles of
the Main/South Base.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 08/30/90
Threats and Contaminants
Ground water and soils have been contaminated with various VOCs. People may face a
health risk by drinking contaminated ground water.
Cleanup Approach
This site is being addressed in six stages: immediate actions and five long-term remedial phases
focusing on cleanup of the entire base, the Main Base/Flightline, the South Base, the
NASA/Ames Laboratory, and remaining areas.
April 1995
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Response Action Status
Immediate Actions: In 1984, drums and contaminated soil in a dram disposal area
were removed, and the site was capped. In addition, contaminants at the Main Base
toxic waste disposal area were removed, and the site was regraded. In the South Base
storage area, tanks were excavated or filled with clean sand, and the area was regraded. In 1989,
a groundwater/fuel separation system was installed and put into operation. The system was
designed to extract jet fuel from the groundwater. It was shut down when trichloroethylene
(TCE) was discovered in the fuel, but was re-started in 1992 after pump replacement.
Entire Base: An investigation into the extent and type of contamination is currently
underway. The investigation is scheduled for completion in 2004, and will help
determine final cleanup remedies for the site.
Main Base/Flightline: In 1992, the Air Force began an investigation of the
contamination found at the Main Base/Flightline. The investigation is scheduled to be
completed in early 1997.
South Base: The Air Force began investigations of the South Base in 1992. The
South Base was abandoned and almost completely demolished in the 1960s. The
investigation into the nature and extent of contamination at South Base is scheduled to
be completed hi late 1998.
NASA/Ames Laboratory: Investigation of this area used by NASA for testing
purposes was initiated in the summer of 1992, and is scheduled to be completed in
late 1999.
Remaining Areas: Investigations into the nature and extent of contamination at the
abandoned homestead wells, the Phillips Laboratory, the Jet Propulsion Laboratory,
and other areas are scheduled to begin in 1996 through 1999.
Site Facts: Edwards Air Force Base is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities. Because of the protracted schedule required to complete long-term cleanup activities,
the base Environmental Program has proposed initiating an aggressive removal action program
beginning in 1995. The State of California and the EPA are in agreement that this is an excellent
approach. Design of this program is underway.
Environmental Progress
The removal of drums, tanks, and contaminated soils has reduced the potential of exposure to
hazardous substances at the Edwards Air Force Base site while investigations are taking place and
cleanup activities are being planned.
April 1995 2 EDWARDS AIR FORCE BASE
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Site Repository
Kern County Public Library, Rosamond Branch, 2645 Diamond Street, Rosamond, CA 93560
EDWARDS AIR FORCE BASE
April 1995
-------
EL TORO MARINE
CORPS AIR STAT
CALIFORNIA
EPA ID# CA6170023208
EPA REGION 9
Orange County
El Toro
Site Description
The El Toro Marine Corps Air Station covers approximately 4,700 acres. Commissioned in
1943, it supports the Fleet Marine Forces in the Pacific Ocean, serving as the major west coast
jet fighter facility. A total of 25 potentially contaminated areas have been identified on the Air
Station, including four landfills containing both hazardous and solid waste, and areas where
polychlorinated biphenyls (PCBs), battery acids, leaded fuels, and other hazardous substances
were dumped or spilled. The Orange County Water District has identified volatile organic
compounds (VOCs) in groundwater over a 3-mile radius off base. There are plumes of
contamination at or near the base boundary. Approximately 1,100 acres of land are irrigated by
wells located within 3 miles of the site; however, none of these wells are drinking water sources.
Surface water flows into the Upper Newport Bay Ecological Reserve, located approximately 8
miles from the base.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/21/90
Threats and Contaminants
The four landfills are contaminated with PCBs, VOCs, acids, fuels, oils, pesticides,
and heavy metals. VOCs have been detected in groundwater. No drinking water
sources have been contaminated. Crops are being watered from VOC-contaminated
irrigation wells. The Upper Newport Bay Ecological Reserve is potentially threatened.
April 1995
-------
Cleanup Approach
This site is being addressed in three long-term remedial phases focusing on cleanup of the
groundwater, identification of the source of VOC contamination, and cleanup of abandoned
wastewater treatment lines and tanks.
Response Action Status
Groundwater: An investigation into the nature and extent of groundwater
contamination began in 1990. An interim remedy, scheduled to be selected in
mid-1996, will address the migration of contamination off site.
Source of VOC Contamination: In 1990, the El Toro Marine Corps began an
investigation to identify the source of VOC contamination at the site. The second
phase of the investigation is scheduled for completion hi mid-1996.
Abandoned Wastewater Treatment Lines and Tanks: In 1990, the El Toro
Marine Corps began a study into the nature and extent of contamination caused by
abandoned wastewater treatment lines and leaking tanks. The investigation is
scheduled for completion in mid-1996.
Site Facts: El Toro Marine Corps Air Station is participating in the Installation Restoration
Program, a specially funded program established by the Department of Defense (DOD) in 1978
to identify, investigate, and control the migration of hazardous contaminants at military and other
DOD facilities.
Environmental Progress
After adding the El Toro Marine Corps Air Station to the NPL, the EPA performed preliminary
investigations and determined that no immediate actions were required while further
investigations are underway.
Site Repository
Heritage Park Regional Library, Reference Section, 14361 Yale Street, Irvine, CA 92714
April 1995 2 EL TORO MARINE CORPS AIR STATION
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FAIRCHILD
SEMICONDUCTO
CORP. (SOUTH
SAN JOSE PLAN
CALIFORNIA
EPA ID# CAD097012298
Site Description
EPA REGION 9
Santa Clara County
San Jose
Other Names:
Fairchild Camera and Instrument
Corporation
Schlumberger Technology Corporation
The 22-acre Fairchild Semiconductor Corp. (South San Jose Plant) site is a former semiconductor
manufacturing facility. Operations were conducted at the site from 1977 until 1983.
Manufacturing operations required the use and storage of industrial solvents. In 1981, Fairchild
discovered that an underground organic solvent waste tank had failed, resulting in soil and on-
and off-site groundwater contamination by a mixture of solvents. Contamination exceeding
drinking water standards was discovered in a public supply well located approximately 1,800 feet
downgradient from the site. The well subsequently was plugged and abandoned. Fairchild has
been investigating and cleaning up soil and groundwater pollution at the facility since
contamination was first detected in 1981. This is one of 28 NPL sites in the South Bay Area of
San Francisco. Facilities at these sites have used a variety of toxic chemicals, primarily
chlorinated organic solvents. Although these sites are listed separately, the EPA intends to
combine cleanup activities at some of the sites as part of an area-wide approach to the
contamination. The City of San Jose has a population of approximately 750,000. The Great Oaks
Water Company provides drinking water to 18,500 connections in southern San Jose, including
the site area. Drinking water is obtained from groundwater production wells, several of which are
located in the area adjacent to and downgradient from the site. There are 25 known private wells
in the area surrounding the site. All but three of these wells have been sealed or properly
abandoned. Of these three wells, two are used for agricultural irrigation and one is used by
Fairchild as a monitoring well.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 10/04/89
Threats and Contaminants
Soil was contaminated with various volatile organic compounds (VOCs). Groundwater
is contaminated with VOCs. The potential threat of direct contact with contaminated
soil has been eliminated through initial actions. All private drinking water wells
located in the area surrounding the site have been sealed or abandoned. The plume of
contaminated groundwater has been reduced through ongoing treatment, and the
potential health threat posed by ingesting groundwater contaminants continues to
decrease.
April 1995
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Cleanup Approach
Response Action Status
Initial Actions: Fairchild implemented several initial cleanup actions that have
decreased the extent and magnitude of groundwater contamination in the area. In
1981, a leaking tank was removed. In 1982, 3,440 cubic yards of contaminated soils
were removed. Since 1982, a series of on- and off-site groundwater extraction wells have been
operating to control the migration of groundwater contaminants. In 1983, wells in several
aquifers that provided potential pathways for contaminant migration to the C Aquifer were sealed.
A slurry wall was built around the perimeter of the site in 1986 to help contain on-site
contaminants within the A and B aquifers.
Entire Site: In early 1989, the potentially responsible party, under EPA oversight,
completed an investigation of the nature and extent of contamination at the entire site.
The following cleanup remedies were selected: treating contaminated on-site soil using
a vapor extraction process; pumping on-site shallow groundwater and off-site groundwater and
treating it using air stripping and carbon adsorption, followed by on-site reinjection of the treated
groundwater; pumping deep groundwater from off-site wells, followed by air stripping and
discharging to surface water using storm drains, or reuse of the groundwater for road
construction and irrigation; conducting laboratory and field studies to determine the effectiveness
of biodegradation on on-site chemicals; implementing deed restrictions to limit groundwater and
land use; and monitoring groundwater. All construction of cleanup remedies was completed by
early 1992. Treatment of the groundwater continues. Groundwater treatment has significantly
reduced the size of the contaminant plume and will continue until approximately late 1999, or
until contaminant levels are within established health-based levels. One of the two off-site
aquifers (the C Aquifer) has reached the designated level.
Site Facts: In response to a Unilateral Order from the State, Fairchild is taking action to
contain and reduce the contaminated groundwater plume.
Environmental Progress
Construction of all cleanup remedies is complete. The removal and treatment of contaminated
soil, the closure of private wells, the operation of the groundwater treatment system, and the
installation of the slurry wall have reduced the potential for exposure to hazardous substances at
the Fairchild Semiconductor Corp. (South San Jose Plant) site while groundwater treatment
system continues until health-based levels are met.
April 1995 2 FAIRCHILD SEMICONDUCTOR CORP.
(SOUTH SAN JOSE PLANT)
-------
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region
2101 Webster Street, Suite 500
Oakland, CA 94612
FAIRCHILD SEMICONDUCTOR CORP. 3 April 1995
(SOUTH SAN JOSE PLANT)
-------
FAIRCHILD
SEMICONDUC
CORP. (MOUNTAI
VIEW PLANT)
CALIFORNIA
EPA ID# CAD095989778
EPA REGION 9
Santa Clara County
Mountain View
Other Names:
:airchild Hazardous Waste Storage
Facility
Faircnlld Camera & Instrument Corp.
Mountain View Plant)
Site Description
The 56-acre Fairchild Semiconductor Corp. (Mountain View Plant) facility manufactures
semiconductors and is located in an area referred to as the Middlefield-Ellis-Whisman (MEW)
Study Area. The MEW Study Area comprises facilities currently owned or operated by 17
companies, including three Superfund sites: Fairchild Semiconductor Corp., Intel Corp., and
Raytheon. The area supports numerous light industries involved in the manufacture of
semiconductors, metal-finishing operations, parts cleaning, aircraft maintenance, aerospace
research and development, missile construction, distribution of petroleum products, dry cleaning,
and other chemical-use and storage operations. Fourteen potential sources of contamination have
been identified in the Fairchild facility, including underground and aboveground storage tanks for
chemical products and wastes, pH neutralization systems, and industrial wastewater treatment
systems. Approximately 270,000 people depend on wells located within 3 miles of the site for
drinking water. Approximately 116,000 residents live within a 3-mile radius.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 02/11/91
Threats and Contaminants
Groundwater is contaminated with volatile organic compounds (VOCs), freon,
isopropyl alcohol, and heavy metals including cadmium, chromium, lead, and nickel.
Soil is contaminated with VOCs. Inhaling vapors from contaminated groundwater or
coming into direct contact with contaminated groundwater or soil may pose a potential
health threat.
April 1 995
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Cleanup Approach
This site is being addressed in three stages: initial actions and two long-term remedial phases
focusing on the cleanup of the shallow aquifer and deep aquifer.
Response Action Status
Initial Actions: Initial cleanup actions included removing tanks from the site,
removing and treating soil, sealing affected wells, and controlling groundwater
movement by installing three slurry walls and 21 groundwater extraction wells.
Shallow Aquifer: In 1989, the following remedies were selected to address
contamination in the shallow aquifer: in-place vapor extraction with treatment of
contaminated soil found within the Fairchild and Raytheon slurry walls; limited soil
excavation and treatment by aeration for some areas outside of the slurry walls, with on-site
disposal of residues in the excavated area; and groundwater extraction and treatment using air
stripping. In 1991, the parties potentially responsible for site contamination began designing the
selected remedy. Final designs are currently being reviewed by the EPA. Cleanup activities are
scheduled to begin in 1996.
Deep Aquifer: In 1989, a remedy was selected to address contamination in the deep
aquifer that includes sealing any conduit or potential conduits to protect the deep
aquifer, and monitoring groundwater. The parties potentially responsible for site
contamination began designing the selected remedy in 1991. Certain cleanup activities began in
1994, with the design of remaining remedies expected to be completed in early 1996. To date,
some potential conduits have been sealed.
Site Facts: In 1985, the EPA issued an Administrative Order on Consent to the parties
potentially responsible for site contamination. As a result of this Order, the potentially
responsible parties are performing site design and cleanup activities.
Environmental Progress
The removal of tanks and contaminated soil and the installation of slurry walls and extraction
wells have reduced the potential of exposure to contaminated groundwater and soil at the
Fairchild Semiconductor Corp. (Mountain View Plant) final cleanup remedies are being designed.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995
FAIRCHILD SEMICONDUCTOR CORP.
(MOUNTAIN VIEW PLANT)
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FIRESTONE TIRE
RUBBER CO.
(SALINAS PLANT)
CALIFORNIA
EPA ID# CAD990793887
EPA REGION 9
Monterey County
6 miles southeast of Salinas
Site Description
The Firestone Tire & Rubber Co. (Salinas Plant) site consists of a 43-acre former tire
manufacturing plant on a 256-acre parcel of land. The site is an industrial park containing
warehouses. Firestone operated a tire manufacturing plant on the site from 1965 to 1980.
Production chemicals apparently were spilled during the manufacturing process. The major
chemical types and raw materials that were used at the plant include carbon, rubber, processing
oil, zinc oxide, solvents, anti-oxidants, steel wire, and petroleum fuels. Solid and hazardous
wastes from the manufacturing processes were disposed of in off-site facilities. Aqueous
industrial wastes and domestic wastewater were treated at two on-site treatment plants. In 1980,
Firestone received a permit to store hazardous wastes. Seventy-nine drums were stored on a
concrete pad on site. Flammable liquids were stored in 52 drums, and 27 drums contained
corrosive liquids. In 1981, these drums were removed to a licensed disposal site. The
contamination at the site was first discovered in 1983, during the plant closing. In 1983, 20
monitoring wells were installed for groundwater investigations, and soil samples were taken. An
estimated 400 drinking water wells have been identified in the area. Approximately 120 people
reside within a 1-mile radius of the site, and 14,000 people live within a 4-mile radius.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Groundwater contains volatile organic compounds (VOCs). Soil was contaminated
with VOCs. Health threats posed by direct contact with contaminated soil have been
eliminated. While no exposure has been documented, people may face a health threat
by ingesting, coming into direct contact with, or inhaling vapors from contaminated
groundwater until treatment is completed.
April 1995
-------
Cleanup Approach
Response Action Status
Initial Actions: Contaminated soil was removed from 1983 to 1984. Soil capping
was performed in 1984 and 1985. On- and off-site shallow aquifers were treated in
1986 and 1987.
Entire Site: In 1989, the California Department of Health Services and the EPA
announced the approval of a cleanup remedy. The plan called for Firestone to install
five new extraction wells to extract groundwater from the intermediate aquifer and to
continue pumping from the wells located in the shallow aquifer. The extracted groundwater will
continue to be treated by the existing treatment plant before being discharged into the Salinas
River. Construction of the cleanup remedy was completed in late 1991. Monitoring of the
aquifers continues. Recent monitoring has shown that the cleanup action has significantly reduced
the size of the contaminated groundwater plume. Treatment is scheduled to continue until 1999
when all site cleanup goals are expected to have been met.
Environmental Progress
Construction of all cleanup remedies has been completed. The removal and capping of the
contaminated soil and the extraction and treatment of contaminated groundwater have reduced the
potential of exposure to contaminants at the Firestone Tire & Rubber Co. (Salinas Plant) site
while final groundwater treatment activities are underway.
Site Repository
EPA Region 9 Superfund Community Relations Office, 75 Hawthorne St., San Francisco, CA
94105
April 1995
FIRESTONE TIRE & RUBBER CO.
(SALINAS PLANT)
-------
FORT ORD
CALIFORNIA
EPA ID# CA7210020676
EPA REGION 9
Monterey County
2 miles north of Monterey
Site Description
The 29,440-acre Fort Ord site was established in 1917 by the U.S. Army as a maneuver area and
field artillery target range. Prior to closing in September 1994, the base's primary mission was
training infantry military personnel. Several areas of contamination exist on site. The facility
contained leaking waste tanks, containers of waste oil and various automotive chemicals,
chemical storage areas, oil-waste separators, target ranges, and landfills. One on-site area is a
150-acre landfill that was primarily used to dispose of residential waste, as well as small amounts
of commercial waste. Other areas include a former fire drill pit, motor pool maintenance areas,
small dump sites, and small arms target ranges. An 8,000-acre firing range, and other limited
areas on-site, pose threats from unexploded ordnance. Approximately 40,000 people obtain
drinking water from wells located within 3 miles of the site. The Salinas River alluvial basin, El
Toro Creek, and Monterey Bay border the site.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 02/21/90
Threats and Contaminants
On-site groundwater and soil are contaminated with heavy metals, fuel hydrocarbons,
and volatile organic compounds (VOCs). Contaminants have been detected in
groundwater samples collected from Fort Ord and Monterey County Water District
water supply wells. On-site soils in several vehicle maintenance and motor pool areas,
and minor dump sites, have been contaminated with chemicals that spilled onto the
ground. In addition, soils at the beach target ranges are contaminated with lead.
Coming into direct contact with contaminated soils may pose a potential health threat
to on-site workers, as well as employees of the Fort Ord Army base. Unexploded
ordnances on an 8,000-acre firing range and limited on-site areas also pose health
threats. Should site-related contaminants migrate off site through the soils or
groundwater, the Salinas River, El Toro Creek, and Monterey Bay could be affected.
April 1995
-------
Cleanup Approach
This site is being addressed in four stages: interim actions and three long-term remedial phases
focusing on cleanup of the entire site, the Fritzsche Army Airfield practice fire pit, and the Fort
Ord Landfill.
Response Action Status
Interim Actions: The Army initiated an investigation into the nature and extent of
groundwater contamination. Preliminary findings showed an area of contamination
known as the Fritzsche Army Airfield practice fire pit. As an interim action, the
Army installed a groundwater and soil treatment system that has been operational since 1988.
The contaminated groundwater is treated through carbon adsorption. A mixture of treated
groundwater and necessary nutrients was sprayed on the contaminated soil adjacent to the
groundwater treatment plant to facilitate the treatment of the soil. Soil treatment is nearing
completion. The interim actions are focused on addressing primarily surface soils contaminated
with fuels and waste oils from motor pools. Soils will be excavated and then treated at a
treatment area using bioremediation or soil vapor extraction. In addition, in 1994, contaminated
soil and debris, buried drums, and buried unexploded ordnance were removed.
Entire Site: In 1990, the Army began further investigations into the nature and
extent of on- and off-site soil and groundwater contamination, as well as any
ecological or health threats that may be present. The investigation has identified two
dump sites, firing ranges, and a vehicle maintenance area that require cleanup actions. The Army
expects to complete the investigation and make final cleanup decisions in the fall of 1997.
Fritzsche Army Airfield Practice Fire Pit: An investigation into the nature and
extent of contamination in the Fritzsche Army Airfield practice fire pit began in 1990.
A remedy is expected to be completed in mid-1995 that will establish groundwater
cleanup standards for the area which must be met through the existing pump and treatment
system.
Fort Ord Landfill: In 1994, the Army completed an investigation focusing on
groundwater and soil contamination originating from the landfill. Monitoring wells
were installed, surface soil samples collected, and soil gas samples taken. The EPA
selected a remedy in the fall of 1994 that includes capping the landfill and installing a
groundwater pump and treatment system. Design of the remedy is underway and expected to be
completed in 1997.
April 1 995 2 FORT ORD
-------
Site Facts: Fort Ord is participating in the Installation Restoration Program, a specially funded
program established by the Department of Defense (DOD) in 1978 to identify, investigate, and
control the migration of hazardous contaminants at military and other DOD facilities. In 1990,
Fort Ord signed an Interagency Agreement with the EPA and the State of California to address
on- and off-site contamination. Fort Ord was officially closed in 1994. The Army is considering
proposals for re-use of the land, but intends to retain a portion of the base for a reserve enclave.
Several parcels have already been transferred to the State University system. Cleanup activities
are not affected by base closure activities, except to the extent that they are being accelerated to
facilitate more rapid land transfers.
Environmental Progress
The groundwater treatment system at the former fire pit and the removal of soil and debris have
reduced the potential of exposure to contaminants while studies leading to the selection of final
cleanup remedies are taking place at the Fort Ord site.
Site Repository
Monterey County Free Libraries, Seaside Branch, 550 Harcourt Avenue, Seaside, CA 93955
FORT ORD
April 1995
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FRESNO MUNI .
/ lYJoTl -/ i Fresno County
SANITARY ^*™"* «"^ <^ — Fresn°
CALIFORNIA
EPA ID# CAD980636914
Site Description
The 130-acre Fresno Municipal Sanitary Landfill site was owned and operated by the City of
Fresno, under a permit issued by the State, from 1935 until it was closed in 1989. The landfill
was used for the disposal of domestic and municipal trash. While conducting tests in 1983, the
California Department of Health Services (CDHS) found methane gas had migrated from the
landfill to the surrounding areas. These tests also concluded that contaminated ground water had
migrated off site to several private residential wells located nearby. The City of Fresno installed
monitoring wells around the landfill perimeter in 1984. Subsequent tests indicated that volatile
organic compounds (VOCs) were present in groundwater taken from wells at the edge of the
landfill. Monitoring wells located upgradient of the site have been found to be contaminated.
Sampling of groundwater from private wells performed in 1989 found that the contaminants do
not pose a significant health threat; however, these wells will continue to be monitored. Access to
the site is restricted by means of a locked gate and a fence that encloses the site. The landfill is
covered with a layer of dirt. Nine municipal wells are located within 3 miles of the site. Water
from these wells empties into a blended system that serves the City of Fresno. The general
distribution area of the system serves approximately 300,000 people. Two agricultural irrigation
wells are located along the western edge of the landfill, and several more are located within a
few thousand feet of the site.
_. _ ..... _..... ., , .. , NPL LISTING HISTORY
Site Responsibility: This site is being addressed through
Federal and municipal actions.
Proposed Date: 06/24/88
Final Date: 10/04/89
Threats and Contaminants
Air contains high concentrations of methane and carbon dioxide, and lower
concentrations of VOCs. Groundwater is contaminated with VOCs from surface
wastes. Since private wells located south of the landfill are contaminated with VOCs,
area residents who depend on these wells as their sole source of drinking water could
be exposed to site-related contaminants. An irrigation canal runs through a pipe
beneath the landfill. Leachate from the landfill may leak into the pipe and contaminate
the irrigation water.
April 1995
-------
Cleanup Approach
This site is being addressed in three stages: initial actions and two long-term remedial phases
focusing on cleanup of the entire site and the groundwater.
Response Action Status
Initial Actions: In 1984, the City of Fresno installed wells around the perimeter of
the landfill to monitor methane and groundwater. The City also built barriers on two
sides of the landfill to prevent methane from migrating off site to nearby homes. In
1990, the City began the removal of migrating landfill gas containing VOCs. The treatment
involves placement of an active vacuum on an existing gas migration barrier to enhance its
effectiveness. The action was completed in 1991.
Entire Site: The potentially responsible parties began an investigation into the nature
and extent of contamination at the Fresno Landfill in 1990. The study addressed
contamination in the groundwater, landfill gas, soils, leachate, and surface gas
emissions. The EPA selected a cleanup remedy in 1993 that calls for capping the landfill,
constructing a gas collection system, building a stormwater management system and, if
necessary, building a leachate collection system. Design of the remedies is currently underway.
Construction is expected to begin in 1997.
Groundwater: In 1990, the potentially responsible parties began an investigation
into the nature and extent of groundwater contamination. The investigation is
expected to be completed in 1996.
Environmental Progress
The construction of barriers and the removal of migrating landfill gas have reduced the threat of
exposure to contaminants from the Fresno Municipal Sanitary Landfill site while studies are
taking place and additional cleanup activities are being planned.
Site Repository
Fresno County Central Library, 2420 Mariposa Street, Fresno, CA 93721
April 1995
FRESNO MUNICIPAL SANITARY LANDFILL
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FRONTIER
FERTILIZER
CALIFORNIA
EPA ID# CAD071530380
EPA REGION 9
Yolo County
Davis
Site Description
The 18-acre Frontier Fertilizer site is located near the eastern boundary of the City of Davis,
California. The Barber and Rowland Co. operated a pesticide and fertilizer distribution facility on
the site from 1972 to 1982. The Frontier Fertilizer Co. used the site from 1982 to 1987.
Operations consisted of delivering pesticides, herbicides, and non-bulk chemicals in cans, drums,
and other containers. Both the Barber and Rowland and Frontier Fertilizer companies used a
4,000-cubic-foot former disposal basin to dispose of unused pesticides and fertilizers. Returned
tanks and containers were washed and the rinsate was dumped into the disposal basin or onto the
ground. In 1985, Frontier Fertilizer excavated approximately 1,100 cubic yards of contaminated
soil from the former disposal basin and land farmed the soil on a field east of the site.
Contaminants not attributed to the former disposal basin were detected in groundwater samples.
These contaminants may be from other potential sources at the site, such as underground storage
tanks, waste oil storage tanks, the northern fuel area, railroad hopper cars, washracks, the grain
storage building, the east and west pole barns, the central machine shop, the eastern farm shop,
the western and central concrete slabs, and the tomato grading station. A new residential area is
being built directly adjacent to the site. Sampling of on-site monitoring wells has shown a release
of contaminants from the site to three aquifers. The deepest aquifer supplies water to the city of
Davis, population 43,168, and the Barthel Mobile Home Park, population 540. Although actual
contamination has not been documented in any of the drinking water wells, the potential for
contamination from the Frontier Fertilizer site exists.
Site Responsibility:
The site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 01/18/94
Final Date: 05/31/94
May 1995
-------
Threats and Contaminants
Surface and subsurface soils in the area of the former disposal basin are contaminated
with numerous pesticides. Some of these pesticides were also found in groundwater
samples collected from on-site and off-site monitoring wells. The groundwater is also
contaminated with numerous volatile organic compounds. People who come in contact
with or ingest surface soils, subsurface soils, and groundwater may face a health risk.
Cleanup Approach
The site is being addressed in both short- and long-term remedial phases focusing on cleanup of
the entire site.
Response Action Status
Early Action: The EPA is addressing the spread of contaminated groundwater with a
granular activated carbon pump and treat system. The system is currently under
construction and is scheduled to be in operation in the summer of 1995. In addition,
the EPA is drafting an Engineering Estimate and Cost Analysis for the excavation of
contaminated soil from a former pesticide pit. The excavation is scheduled to begin in early
1996.
Entire Site: The EPA began an investigation of the nature and extent of remaining
areas of contamination at the site in 1993. An on-site field lab is evaluating potential
areas of contamination to determine if additional soil should be removed. If additional
soil removal is necessary, the removal will be performed along with the early action removal
described above.
Site Facts: The Frontier Fertilizer site was never issued a Resource Conservation and Recovery
Act (RCRA) permit to treat, store, or dispose of hazardous wastes. The EPA is addressing this
site using the Superfund Accelerated Cleanup Model (SACM). Under SACM, site assessment
activities are undertaken to support both early and long-term cleanup actions. Site conditions and
their associated risks are assessed continuously until all necessary data are collected to screen the
site or support any needed response actions. Response actions are initiated once evidence
indicates that early action is warranted. Under SACM, the public is notified early of the
potentially hazardous conditions of the site. The EPA also gives early notification to polluters of
their potential liability for conducting or paying for cleanup activities.
Environmental Progress
When the site was added to the NPL, the EPA determined that the site did not pose an immediate
threat to people or the environment; however, recent migration of contamination into an
important aquifer has prompted the groundwater treatment response described above.
May 1995 2 FRONTIER FERTILIZER
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Site Repository
Yolo County Library, 315 East Fourteenth St., Davis, CA 95616
University of California, Shields Library Government Documents Department, Davis, CA 95616
FRONTIER FERTILIZER
May 1995
-------
Site Description
IMP nHWff—-^^^] EPA REGION 9
, 1NU., UUmg^ 9 Contra Costa County
CALIFORNIA Vs^O^ _-> Antioch
EPA ID# CAD980498562
The GBF, Inc., Dump is an 88-acre site located at the corner of Somersville Road and James
Donlon Boulevard. The site is bordered by residential developments on the north and east, a
former petroleum tank farm on the east, and the former Lynch sanitary landfill for municipal
wastes on the south. From the early 1960s to 1975, Industrial Tank Corp. leased the eastern 64
acres of the site and operated 10 unlined surface impoundments covering approximately 11 acres.
The impoundments were interconnected by a series of cascading conduits, allowing liquid wastes
to flow freely. The company accepted sludges, acids, oils, and slurries containing hazardous
substances such as heavy metals, asbestos, formaldehyde, pesticides, and volatile organic
compounds (VOCs). In 1974, the California Regional Water Quality Control Board (CRWQCB)
issued a Cleanup and Abatement Order which closed the surface impoundments and prohibited
hazardous waste disposal after 1974. Since then, the site has accepted only non-hazardous waste.
In 1990, the California Department of Toxic Substances Control (CDTSC) conducted a study that
revealed contamination in monitoring wells north of the site. High levels of lead were detected in
the sediments of Markley Creek which is located west of the property and runs north between the
cities of Antioch and Pittsburgh, eventually emptying into a marsh adjacent to the San Joaquin
River. The Contra Costa Canal runs west along the northern border of the site and is the primary
source of drinking water for nearby cities. Intakes located within 15 miles downstream provide
drinking water to approximately 327,500 people. Residents outside the limits of the municipal
canal water system generally drink bottled water.
Site Responsibility: This site is being addressed through
Federal, State, and local actions.
NPL LISTING HISTORY
Proposed Date: 02/07/92
Threats and Contaminants
Monitoring wells to the north of the site are contaminated with cyanide, VOCs, and
heavy metals such as cadmium and nickel. Markley Creek sediments are contaminated
with high levels of lead. Individuals who ingest or come into direct contact with
contaminated sediments or groundwater could be at risk.
April 1995
-------
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on the cleanup of the entire site.
Response Action Status
Initial Actions: In 1974, the surface impoundments were closed and hazardous waste
disposal at the site was prohibited.
Entire Site: In 1993, the potentially responsible parties began an investigation, under
CDTSC oversight, to determine the nature and extent of contamination at the site and
to identify alternatives for cleanup action. The investigation is expected to be
completed in late 1995.
Site Facts: A Cleanup and Abatement Order was issued by the CDTSC in 1974, which closed
the surface impoundments and prohibited further hazardous waste disposal.
Environmental Progress
Closing the surface impoundments and prohibiting further hazardous waste disposal at the site
have reduced potential threats to public health and safety while investigations continue at the
GBF, Inc. Dump site.
Site Repository
California Department of Toxic Substances Control
916-255-2002
April 1995 2 GBF, INC., DUMP
-------
GEORGE AIR
FORCE BASE
CALIFORNIA
EPA ID# CA2570024453
EPA REGION 9
San Bernardino County
Victorville
Site Description
George Air Force Base occupies 5,347 acres. The base, which was closed in December 1992,
supported tactical fighter operations and provided training for air crew and maintenance
personnel. Sixty-three potential areas of contamination have been identified at this facility.
Approximately 15,400 people live within 3 miles of the base, and 11,000 people reside within 1
mile of the facility.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 02/21/90
Threats and Contaminants
Groundwater and soil are contaminated with jet fuel, chlorinated solvents including
trichloroethylene (TCE), volatile organic compounds (VOCs), and medical wastes.
Accidental ingestion of, or direct contact with the contaminants may pose a health
risk.
Cleanup Approach
This base is being addressed in several phases: initial actions and three long-term remedial phases
focusing on cleanup of the Northeast disposal and S-20 areas, Liquid Fuel Distribution System,
and the landfills and disposal areas.
March 1995
-------
Response Action Status
Initial Actions: In late 1991, the Air Force finished installing and began operating a
system for pumping and treating groundwater contaminated with TCE under the
northeast disposal area. In early 1992, the Air Force finished installation and began
operation of a system designed to remove jet fuel free product at the Liquid Fuel Distribution
System (LFDS). The Air Force has performed several removal actions at sites with soil
contaminated with low levels of jet fuel.
Northeast Disposal and S-20: This subsite has further been divided into three
areas: the industrial storm drain line and outfall; the sewage treatment plant
percolation ponds; and the TCE groundwater plume beneath the northeast disposal
area. Following an investigation, a decision was made that the industrial storm drain line and
outfall and the sewage treatment plant percolation ponds would not require cleanup. A remedy
was selected; however, to further address the groundwater plume under the northeast disposal
area. When the remedy was selected, the Air Force had already installed a treatment system to
address part of the TCE plume. This treatment system consisted of two air stripping towers and
nine extraction wells, pumping approximately 240 gallons per minute. The remedy indicated that
additional extraction wells should be installed to capture the entire plume. These additional
extraction wells are scheduled to be installed in 1995.
Liquid Fuel Distribution System: This area consists of six areas that make up the
liquid fuel distribution system. The system delivered jet fuel from several large above
ground tanks, near the main gate, to the runway several miles away, where it was
dispensed from seven fuel hydrants to the aircraft. The investigation of the area was completed in
1992 and determined that fuel had leaked along the runway and is present in four separate ways
beneath the flight line: in the vadose zone; in the capillary fringe; as floating free product; and
dissolved in the groundwater. The VOCs benzene, toluene, ethylbenzene, and xylene are the
contaminants of concern. An additional study is being performed to determine alternatives for the
cleanup of groundwater contaminated with jet fuel to supplement the initial action currently
underway which is removing jet fuel free product.
Landfills and Disposal Areas: This subsite consists of the 56 areas at the base.
Most of them are disposal areas of varying size including 12 large landfills. Other
areas include the fire fighting training area, the engine test cells, a medical waste site,
and various small disposal points. Investigations into the nature and extent of contamination at the
subsite are ongoing and scheduled for completion in late 1995.
Site Facts: The EPA and the Department of Defense (DOD) have signed an Interagency
Agreement for cleaning up the base. This base is participating in the Installation Restoration
Program, a specially funded program established by the DOD in 1978 to identify, investigate,
and control the migration of hazardous contaminants at military and other DOD facilities.
March 1995 2 GEORGE AIR FORCE BASE
-------
Environmental Progress
The pumping and treating of groundwater contaminated with TCE and the removal of jet fuel
free product are reducing the threat to human health and the environment. The Air Force has
investigated the suspected low level radioactive waste area and determined that no wastes or
residual contamination were present. The Air Force has already removed several areas of soil
contamination thereby further reducing the risks while further cleanup actions are being planned.
Site Repository
San Bernardino County Public Library, Adelanto Branch, 11744 Bartlett Avenue,
Adelanto, CA 92301
GEORGE AIR FORCE BASE
March 1995
-------
HEWLETT-PACI«
(620-640 PAGE
MILL ROAD)
CALIFORNIA
EPA ID# CAD980884209
Site Description
EPA REGION 9
Santa Clara County
Palo Alto
Hewlett-Packard manufactured optoelectronic equipment on this 10-acre site from 1962 to 1986.
In 1981, at least 300 gallons of waste solvents leaked from a buried storage tank. The company
excavated the tank and approximately 100 cubic yards of contaminated soil in 1981 and
transported the materials to a hazardous waste facility. Since 1982, the company has been
pumping and treating contaminated groundwater. The nearest residential areas are located
approximately 1/8 mile northeast of the facility. Five municipal backup supply wells draw water
from a deeper aquifer located within 3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal, Slate, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/21/90
Threats and Contaminants
Volatile organic compounds (VOCs) were detected in groundwater under the tank area
and in the soils sampled from the former tank location. Potential health risks include
accidentally ingesting or coming into direct contact with contaminated groundwater or
soil. Chemicals in the shallow aquifer have migrated off site in a northerly direction.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
April 1995
-------
Response Action Status
Immediate Actions: In addition to the tank and soil excavation activities conducted
in 1981, Hewlett-Packard excavated an additional 810 cubic yards of soil around the
former tank area in 1987. Pumping and treating contaminated groundwater has been
underway since 1982.
Entire Site: In 1989, under State oversight, Hewlett Packard initiated an
investigation to determine the nature and extent of contamination remaining at the site
and to identify alternative cleanup remedies. The investigation was completed and a
final cleanup remedy was selected in 1995. The remedy includes groundwater extraction and
treatment, and soil vapor extraction and treatment.
Environmental Progress
The excavation and disposal of the storage tank and contaminated soil and the continuing
treatment of contaminated groundwater have reduced the potential for exposure to hazardous
materials at the Hewlett-Packard (620-640 Page Mill Road) site while final cleanup activities are
being planned.
Site Repository
U.S. Geological Survey Library, 345 Middlefield Road, Menlo Park, CA 94025
April 1995
HEWLETT-PACKARD
(620-640 PAGE MILL ROAD)
-------
INDUSTRIAL
PROCESSING
CALIFORNIA
EPA ID# CAD980736284
EPA REGION 9
Fresno County
Pinedale
Site Description
The 1/2-acre Industrial Waste Processing site was a solvent recycling facility from 1967 to 1981.
The facility reclaimed glycols from petroleum residues recovered from natural gas field pipelines
and non-chlorinated solvents generated by the paint and ink industries. The facility also recovered
lead solder and zinc from waste solder flux generated by the metal can manufacturing industry.
The site consisted of an office/laboratory building, an open chemical storage shed, eight
aboveground tanks, solvent distillation stills, approximately 250 drums containing waste solvents
and lead solder flux, approximately 50 cubic yards of lead solder waste stored in two piles, and
about 50 bags and 30 drums of asbestos. The closest residence is located 40 feet from the site
perimeter. The surrounding population within a 3 mile radius of the site is approximately 68,000.
An estimated 348,000 people depend on the groundwater for drinking water. There are 119 wells
located within 3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/26/89
Final Date: 08/30/90
Threats and Contaminants
Groundwater is contaminated with solvents. Lead, asbestos, acetone and other solvents
have been found in the soil. Potential health threats may exist if contaminated vapors
or particles are inhaled. People also may be at risk from accidentally ingesting or
coming into direct contact with contaminated groundwater or soil.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
April 1995
-------
Response Action Status
Immediate Actions: In 1988, the EPA removed all asbestos found in bags, drums
and building insulation, and all lead solder wastes in drums and piles; secured the
site from unauthorized access; developed site safety plans; implemented dust
suppression actions; monitored for fugitive vapors and dusts; and removed 19,000 gallons of
hazardous liquids and 290 cubic yards of contaminated soil.
Entire Site: In 1992, the potentially responsible parties, under EPA oversight, began
an investigation into the nature and extent of residual soil contamination at the site.
The investigation, which was completed in the fall of 1993, has identified soil
contaminants and recommend alternatives for the final cleanup. The decision about the final soil
cleanup action is scheduled to be made in mid-1995. In 1995, the potentially responsible parties
began additional investigations into the nature and extent of groundwater contamination. These
investigations are scheduled for completion in 1997.
Environmental Progress
Restricting site access, removing asbestos, lead solder waste, hazardous liquids, and contaminated
soil, and performing the dust suppression actions described above, have reduced the potential
threat of direct contact with contaminants in the soil at the Industrial Waste Processing site while
studies and final cleanup activities are being planned.
Site Repository
Fresno County Library, Main Library, 2420 Mariposa Street, Fresno, CA 93721
April 1995
INDUSTRIAL WASTE PROCESSING
-------
INTEL CORP.
(MOUNTAIN
VIEW PLANT)
CALIFORNIA
EPA ID# CAD061620217
Site Description
EPA REGION 9
Santa Clara County
Mountain View
The Intel Corp. manufactured semiconductors at this 2-acre site from 1968 until 1981. The site is
one of three Superrund sites that are being cleaned up simultaneously. The other two NPL sites
are Fairchild Semiconductor Corp. (Mountain View Plant) and Raytheon Corp. The sites are
located in the Middlefield-Ellis-Whisman (MEW) Study Area. Various industrial activities were
conducted near the site, including semiconductor manufacturing, metal finishing operations, parts
cleaning, aircraft maintenance, and other activities requiring the use, storage, and handling of a
variety of chemicals, particularly solvents. Site investigations at several of these facilities during
1981 and 1982 revealed significant soil and groundwater contamination by toxic chemicals,
primarily volatile organic compounds (VOCs). Approximately 270,000 people depend on
groundwater located within 3 miles of the site as a source of drinking water. Most of the runoff
from the area goes into Stevens Creek.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/01/86
Threats and Contaminants
Groundwater is contaminated with VOCs, isopropyl alcohol, and freon. VOCs also
are found in the soil. People who inhale vapors from contaminated groundwater or
come into direct contact with contaminated groundwater or soil may be at risk.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
April 1995
-------
Response Action Status
Immediate Actions: Since 1982, Intel has been pumping and treating groundwater
by carbon adsorption. By 1986, Intel had removed about 4,600 cubic yards of
contaminated soil. Other immediate actions performed by the company included
removing tanks and sealing contaminated wells to prevent contaminant migration.
Entire Site: In 1989, under EPA oversight, the potentially responsible parties
completed a site investigation. The following remedies were selected: treatment of
contaminated soil by in-place vapor extraction; limited excavation of soil and
treatment by aeration for some areas outside of the slurry walls, with on-site disposal of residues
in the excavated area; groundwater pumping and treatment using air stripping; sealing any
conduits or potential conduits of contaminant migration to protect the deep aquifer; and
groundwater monitoring. In 1991, the potentially responsible parties began the technical design
for the selected cleanup remedies. Final site cleanup is scheduled to begin in the fall of 1995.
Soil cleanup will take from 1 to 6 years, with groundwater cleanup lasting much longer, due to
the physical and chemical nature of the contaminated aquifers. Regular monitoring is planned to
assess cleanup progress.
Site Facts: In 1985, the EPA issued an Administrative Order On Consent to Intel, Fairchild
Semiconductor, and Raytheon, requiring the three companies to conduct a joint site investigation.
Environmental Progress
The pumping and treatment of the groundwater as well as the removal of contaminated soil and
tanks have reduced the potential of exposure to contaminated materials at the Intel Corp.
(Mountain View Plant) site while final cleanup remedies are being designed.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995
INTEL CORP. (MOUNTAIN VIEW PLANT)
-------
INTEL CORP.
(SANTA CLARA III)
CALIFORNIA
EPA ID# CAT000612184
Site Description
EPA REGION 9
Santa Clara County
Santa Clara
The Intel Corp. (Santa Clara III) plant performs quality control of chemicals and tests
microprocessors at this 4-acre facility. Volatile organic compounds (VOCs) are present in the
groundwater in the shallow aquifer. This is one of 28 sites in the South Bay Area, located near
San Francisco. Facilities at these sites have used a variety of toxic chemicals, primarily
chlorinated organic solvents, which have contaminated a common groundwater basin. Although
the sites are listed separately on the NPL, the EPA intends to combine cleanup activities at some
of the sites as part of an area-wide approach to the contamination. Approximately 300,000 people
depend on groundwater located within 3 miles of the site as a source of drinking water. There are
27 wells within 3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/01/86
Threats and Contaminants
Groundwater has been contaminated with VOCs. Based on available information, this
site is not considered to be of public health concern because of the apparent absence
of people being exposed to hazardous substances. However, people could face a health
risk if they accidentally ingest or come into direct contact with contaminated water.
Inhaling contaminated vapors could also pose a health risk.
April 1995
-------
Cleanup Approach
Response Action Status
Immediate Actions: In 1985, the potentially responsible party installed and began
operating a groundwater extraction and treatment system.
Entire Site: In 1990, under EPA oversight, the potentially responsible parties
completed an investigation of the nature and extent of contamination at the site. The
remedy selected by the EPA in 1990 included: continuing groundwater extraction and
treatment with an expanded granular-activated carbon system, discharging the treated
groundwater to San Tomas Aquino Creek; monitoring groundwater; and performing a
demonstration project to evaluate various groundwater pumping strategies for cleaning up residual
levels of VOCs left behind in aquifer material. A pulsed pumping strategy was identified and
currently is in operation. Additional wells to extract contaminants have been installed. Deed
restrictions for use of the property were put into place in 1992. Construction of cleanup remedies
was completed in the fall of 1992. The groundwater treatment system is currently in operation.
Cleanup activities are expected to continue until the fall of 1999, or until established cleanup
goals are met. Pollutant concentrations have reached levels such that only small amounts of
pollutants are being removed. Strategies for cleaning up residual VOC contamination are being
evaluated because pulsed pumping has not significantly decreased contamination levels.
Environmental Progress
The construction of all cleanup remedies is complete. The groundwater extraction and treatment
system continues to reduce the potential of exposure to contaminated groundwater at the Intel
Corp. (Santa Clara III) site.
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region
2101 Webster Street, Suite 500
Oakland, CA 94612
April 1995
INTEL CORP. (SANTA CLARA III)
-------
INTEL MAGNETICS
CALIFORNIA
EPA ID# CAD092212497
EPA REGION 9
Santa Clara County
Santa Clara
Other Names:
Micro Storage/Intel Magnetics
Site Description
The Intel Magnetics site is a 1-acre facility that produced and tested magnetic products and
computer memories. Micro Storage occupied the site from 1985 to 1986 and used the facility for
research and development and pilot manufacturing. Micro Storage also occupied a property
adjacent to and upgradient from the site that contributes to the contamination. Monitoring wells
on the site are contaminated with volatile organic compounds (VOCs), believed to have resulted
from surface spills and a leak from an underground storage tank. This is one of 28 NPL sites in
the South Bay Area of San Francisco. Facilities at these sites have used a variety of toxic
chemicals, primarily chlorinated organic solvents, which have contaminated a common
groundwater basin. Although the sites are listed separately on the NPL, the EPA intends to
combine cleanup activities at some of the sites as part of an area-wide approach to the
contamination. Approximately 300,000 people depend on groundwater within 3 miles of the site
as a source of drinking water. Twenty Santa Clara wells and four Sunnyvale wells are located
within a 3-mile radius of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Groundwater is contaminated with various VOCs. Accidental ingestion of or direct
contact with contaminated groundwater may pose a health risk.
April 1995
-------
Cleanup Approach
Response Action Status
Immediate Actions: The company installed a groundwater extraction and treatment
system to pump and treat contaminated groundwater in 1990. In early 1991,
additional wells for the extraction and treatment system were installed at the site.
Entire Site: The potentially responsible parties, under State supervision, completed
an investigation into the nature and extent of contamination at the site in early 1991.
A groundwater extraction and carbon adsorption treatment remedy was chosen in late
1991. Construction of the treatment system began in late 1991 and was completed in 1992.
California's Regional Water Quality Control Board is currently investigating the potential need
for additional monitoring wells. Groundwater treatment will continue until established cleanup
goals for the site are met.
Environmental Progress
The construction of cleanup remedies is complete. The pumping and treating of contaminated
groundwater has, and will continue to reduce the potential of exposure to contaminated
groundwater at the Intel Magnetics site. Treatment will continue until established cleanup goals
are met.
Site Repository
Santa Clara City Library, Central Library, 2635 Homestead Road, Santa Clara, CA 95051
April 1995
INTEL MAGNETICS
-------
INTERSIL, INC./
SIEMENS
COMPONENTS
CALIFORNIA
EPA ID# CAD041472341
Site Description
EPA REGION 9
Santa Clara County
Cupertino
Intersil, Inc. and Siemens Components have manufactured semiconductors for several years on
two locations covering 15 acres. Siemens currently is an operating facility, while Intersil is now
inactive. Investigations conducted in 1982 as part of the California Regional Water Quality
Control Board's (CRWQCB) underground storage tank leak detection program found volatile
organic compounds (VOCs) in soils on the site and in on- and off-site contamination.
Contamination is believed to have resulted from localized spills and from leaking underground
storage tanks and piping from the two companies. At the Siemens facility, four underground
tanks were used to store waste solvents. At the Intersil facility, possible sources of contamination
include the waste neutralization systems and the concrete scrubber pit sumps. More than 300,000
people obtain drinking water from public wells located within 3 miles of the site. The
groundwater is used for the municipal water supplies of the cities of Cupertino, Santa Clara, and
Sunnyvale. Five municipal water supply wells are located within 1 mile of the site. Three of
these wells, operated by the City of Santa Clara, are located downgradient of the site. The
distance from the site to the City of Santa Clara Well #15, the closest municipal well, is 1,300
feet. Calabazas Creek, an intermittent stream, is located approximately 1,500 feet east of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 08/30/90
Threats and Contaminants
m
Groundwater, soil, and air have been contaminated with VOCs. Ongoing cleanup
activities continue to reduce the potential health threats from direct contact with
contaminated soils, ingestion of contaminated groundwater, inhalation of VOCs from
the use of groundwater, and inhalation of chemicals released from the soils.
April 1995
-------
Cleanup Approach
Response Action Status
Immediate Actions: Immediate actions included the removal of an underground
waste handling and solvent storage system and surrounding soil, installation and
operation of groundwater extraction and treatment systems, and installation and
operation of soil vapor extraction and treatment systems.
Entire Site: In 1990, the EPA selected a remedy to address soil and groundwater
contamination at the site. Approximately 40 cubic yards of soil have been removed
and disposed of in an EPA-approved facility. Twenty-three soil vapor extraction wells
have been built, along with a carbon adsorption treatment facility. Groundwater is being
extracted, treated by air stripping, and discharged into Calabazas Creek. Monitoring of
groundwater and soil will continue to verify the contaminants remain within health-based levels.
The soil and groundwater treatment systems are expected to continue to operate until 1999.
Site Facts: In 1986, the CRWQCB issued waste discharge requirements under the California
Water Code that required Intersil, Inc. and Siemens Components to determine the extent of
contamination in groundwater and soils. In 1989, the CRWQCB issued site cleanup requirements
and approved the work plan and schedule for on- and off-site investigative activities.
Environmental Progress
Construction of all cleanup remedies has been completed. The removal of tanks and contaminated
soil has reduced the potential for exposure to contaminated materials at the Intersil, Inc./Siemens
Components site while groundwater cleanup continues.
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region, 2101 Webster Street, Suite
500, Oakland, CA 94612
April 1995
INTERSIL, INC./ SIEMENS COMPONENTS
-------
IRON
MOUNTAIN
MINE
CALIFORNIA
EPA ID# CAD980498612
EPA REGION 9
Shasta County
) miles northwest of Redding
Site Description
From the 1860s through 1963, the 4,400-acre Iron Mountain Mine (IMM) site periodically was
mined for iron, silver, gold, copper, zinc, and pyrite. Though mining operations were
discontinued hi 1963, underground mine workings, waste rock dumps, piles of ore mine tailings,
and an open mine pit still remain at the site. Historic mining activity at IMM has fractured the
mountain, exposing minerals in the mountain to surface water, ram water, and oxygen. When
pyrite is exposed to moisture and oxygen, sulfuric acid forms. This sulfuric acid runs through the
mountain and leaches out copper, cadmium, zinc, and other heavy metals. This acid flows out of
the seeps and portals of the mine. Much of the acidic mine drainage ultimately is channeled into
the Spring Creek Reservoir by creeks surrounding IMM. The Bureau of Reclamation periodically
releases the stored acid mine drainage into Keswick Reservoir. Planned releases are timed to
coincide with the presence of diluting releases of water from Shasta Dam. On occasion,
unplanned spills and excessive waste releases have occurred when Spring Creek Reservoir
reached capacity. Without sufficient dilution, this results in the release of harmful quantities of
heavy metals into the Sacramento River. Approximately 47,600 people use surface water within 3
miles as their source of drinking water. The low pH level and the heavy metal contamination
from the mine have caused the virtual elimination of aquatic life in Slickrock Creek, Boulder
Creek, and a section of Spring Creek. Since 1940, high levels of contamination in the
Sacramento River have caused numerous fish kills. The continuous release of metals from IMM
has contributed to a steady decline in the fisheries population in the Sacramento River. In 1989,
the National Marine Fisheries Service took emergency action to list the Winter Run Chinook
Salmon as threatened under the Endangered Species Act and to designate the Sacramento River
from Red Bluff Diversion Dam to Keswick Dam as a critical habitat. In January 1994, the
National Marine Fisheries Services issued its final rule reclassifying the Winter Run Chinook
Salmon as an endangered species.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/01/83
April 1995
-------
Threats and Contaminants
Surface water has been contaminated by the release of sulfuric acid, copper, zinc, and
cadmium from the mine. People face a health risk if they accidentally ingest or come
into direct contact with contaminated water or mine drainage. There is a potential for
accumulation of contaminants in fish. The unplanned release of contaminants acutely
toxic to fisheries has led to the steady decline in fish populations and has contributed
to the listing of the Winter Run Chinook Salmon as an endangered species.
Cleanup Approach
This site is being addressed in five stages: emergency actions and four long-term remedial phases
focusing on water management, and cleanup of Boulder Creek, the Old Mine/No. 8 Mine, and
the entire site.
Response Action Status
Emergency Actions: A lime neutralization process was installed at the site to treat
acid mine discharge from the Richmond Portal prior to discharge to the reservoir.
This system was operated by the EPA during the winter rainy season of 1988 until
1989. Zeneca (formerly ICI Americans), a potentially responsible party, operated a similar
system during the 1989 to 1990, 1990 to 1991, 1991 to 1992, and 1992 to 1993 rainy seasons.
Water Management: In late 1986, the EPA selected cleanup remedies addressing
several parts of the Water Management area. Cleanup activities include: capping
selected cracked and caved ground areas; diverting clean Upper Slickrock Creek water
around waste rock and mine tailing piles; diverting Upper Spring Creek; diverting clean surface
water in South Fork Spring Creek to Rock Creek; enlarging the Spring Creek debris dam; and
performing hydrogeologic studies and field-scale pilot demonstrations to better define the acid
mine drainage formation. The studies and pilot demonstrations were completed. In 1989, the
EPA completed capping cracked and caved ground areas and the open pit mine on Iron
Mountain. The EPA completed the diversion of Slick Rock Creek in early 1990. Zeneca also
completed construction of the Upper Spring Creek diversion in early 1990. In the summer of
1994, the EPA proposed that the diversion of South Fork Spring Creek not be part of the selected
remedy. The construction of the diversion has been delayed until the fall of 1995, when a final
decision regarding the potential change in the remedy is scheduled to be made. The EPA is in the
process of amending the remedy selected to enlarge the Spring Creek debris dam. The final
remedy is scheduled to be finalized in the fall of 1995.
Boulder Creek: The EPA has studied the nature and extent of contamination in the
Boulder Creek Watershed. In late 1992, the EPA selected a remedy to treat the acid
mine drainage discharges from the Richmond and Lawson tunnels by constructing a
treatment plant. The treatment plant has been built and is operating. Treatment will continue until
all cleanup goals are met.
April 1995 2 IRON MOUNTAIN MINE
-------
Old Mine/No. 8 Mine: The EPA has studied the nature and extent of
contamination from the mine seep that originated from the Old Mine and No. 8
Mine. In the fall of 1993, the EPA selected the final cleanup remedy, which
included collecting and treating the acid mine drainage discharges. The treatment system has been
built and will operate until all cleanup goals have been met.
Entire Site: In addition to the activities listed above, the EPA is studying the type
and extent of contamination across the entire site. At the conclusion of the study,
planned to be completed in 1996, recommendations for the final site cleanup remedies
will be made.
Site Facts: In 1989, the EPA ordered the potentially responsible parties to implement
emergency response corrective measures to remove the metal contamination. In 1990, the EPA,
under an Administrative Order, required the parties to implement the Upper Spring Creek
diversion cleanup action. In 1991, the EPA ordered the potentially responsible parties to assume
responsibility for operation and maintenance of the completed cleanup actions. In 1992, the EPA
ordered the potentially responsible parties to construct the treatment system for the Boulder Creek
Watershed. In 1993, the EPA ordered potentially responsible parties to implement the collection
and treatment system for the acid mine drainage discharges at the Old Mine/No. 8 Mine.
Environmental Progress
The installation and operation of the full scale neutralization system, the capping of areas of the
mine, and the diversion of Slickrock Creek have reduced the acid and metal contamination in
surface water at the Iron Mountain Mine site while cleanup activities are continuing and
additional studies are taking place. The diversion of Upper Spring Creek has greatly increased the
ability of the EPA and the Bureau of Reclamation to manage the release of contaminants from the
site, which will avoid harm to fisheries in the future.
Site Repository
Shasta County Library, 1855 Shasta Street, Redding, CA 96001
IRON MOUNTAIN MINE
April 1995
-------
J. H.
BAXTER & C
CALIFORNIA
EPA ID# CAD000625731
Site Description
EPA REGION 9
Siskiyou County
Weed
Other Names:
Roseburg Forest Products
Baxter/International Paper/Roseburg
J.H. Baxter & Co. has owned and operated a 35-acre wood-treatment facility at this site since
1962. Prior to 1962, the plant was owned by Long Bell Lumber Company and International
Paper. Roseburg Forest Products operates a 1,000-acre lumber mill adjacent to the site. Wood
treatment operations at Baxter involve the application of chemical compounds to lumber to help
the wood resist deterioration caused by insects and fungi. The current processes use creosote,
petroleum, arsenic, copper, chromium, and zinc. Until 1982, however, Baxter also used
pentachlorophenol (PCP). For approximately 25 years prior to 1962, the International Paper
Company operated the facility and used many of these same chemicals. Hazardous sludges were
disposed of on site in unlined pits or bermed areas. From 1976 to 1983, contaminated process
water was sprayed onto an open field at the southern edge of Baxter's property. Excess
waste water periodically was held in unlined ponds, entering soil and groundwater. An additional
source of contamination has been excess chemicals that have dripped from treated lumber onto
the soil. In addition, periodic overflows, accidents, and leaks have contributed to the
environmental problems at the site. Approximately 3,450 people live within 3 miles of the site,
and 200 people within 3 miles use groundwater as a drinking water source. Beaughton Creek,
which has been contaminated by site chemicals, runs through the site and formerly was a prime
trout habitat.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 10/04/89
Threats and Contaminants
ZE
Groundwater, surface water, and sediments are contaminated with PCP, creosote,
poly nuclear aromatic hydrocarbons (PNAs), arsenic, and heavy metals including
chromium, and zinc. Soil contains arsenic, chromium, PCP, creosote, PNAs, and
dioxin. People face a health threat if they accidentally ingest, inhale, or come into
direct contact with contaminated groundwater, soil, surface water, sediments, or dust.
In 1990, the EPA sampled off-site soils for arsenic and chromium, but found no
significant contamination. Beaughton Creek, formerly a trout habitat, has been
contaminated with creosote.
April 1995
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Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1986, the potentially responsible parties installed a fence
around the site to prevent direct contact with the site contaminants.
Entire Site: In 1990, the EPA selected a cleanup approach for contaminated
groundwater and soils at the site. The selected ground water cleanup plan involves
extraction, biotreatment, and chemical precipitation of contaminants. The treated
groundwater will be reinjected or used for irrigation or industrial processes. Contaminated soil
will be excavated and treated in one of two ways: naturally occurring microorganisms will be
used to treat soils contaminated with organic chemicals, and soils contaminated with inorganic
chemicals will be treated using a cement-like substance to chemically fix the contaminants.
Recent surveys indicate that fish are returning to Beaughton Creek and that dredging sediments
for cleanup purposes would do more harm than good. Engineering designs for the groundwater
and soil cleanup began in 1991 and are expected to be completed in late 1995. In 1993, the
potentially responsible parties built an interim groundwater treatment plant while the final design
work is being completed.
Site Facts: In 1983, the California Regional Water Quality Control Board (CRWQCB) issued a
Cleanup and Abatement Order and a Cease and Desist Order. In 1984, the CRWQCB ordered
Roseburg to cease discharge of contaminated water. In 1991, EPA issued a Unilateral
Administrative Order to the responsible parties requiring them to carry out the cleanup.
Environmental Progress
A fence installed at the site restricts contact with site contaminants at the J.H. Baxter site while
cleanup activities are being planned.
Site Repository
Weed Library, 780 South Davis Street, Weed, CA 96094
April 1995
J. H. BAXTER & CO.
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JASCO
CHEMICAL
CORP.
CALIFORNIA
EPA ID# CAD009103318
Site Description
EPA REGION 9
Santa Clara County
Mountain View
The 2-acre Jasco Chemical Corp. site has been at its present location since 1976, although it has
operated for 35 years. Jasco repackages or formulates chemical products for retail sales. Bulk
solvents used at the site are received by tankers and are stored in eight underground storage
tanks. Prior to 1985, Tank #3 was used to store pentachlorophenol (PCP), which was an
ingredient of a wood preservative formerly produced by Jasco. The product was discontinued in
1985, and the tank was converted to store paint thinner. Elevated levels of volatile organic
compounds (VOCs) were detected in soils from a swale area located behind the building and in
the shallow groundwater. Past waste disposal practices, and possibly leakage from an
underground storage tank and surface water, may have contributed to soil and groundwater
contamination. The City of Mountain View has a total population of approximately 62,000. The
only surface water body within 1 mile is Permanente Creek. Approximately 330,000 people
within 3 miles of the site depend on groundwater for drinking water. In 1987, the City of
Mountain View shut down one well near the site to determine whether site activities would affect
the well. In 1988, the well was placed back into operation, after investigations revealed that
contamination had not migrated into the groundwater for this well.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 10/04/89
Threats and Contaminants
ZE
Groundwater is contaminated with VOCs, PCPs, and diesel fuel. Soil contains VOCs
and diesel fuel. Surface water is contaminated with VOCs. People's health may be
adversely affected if they inhale contaminated vapors, or drink or come in direct
contact with contaminated water or soils.
April 1 995
-------
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: Jasco has installed groundwater monitoring wells, took soil
samples, and removed some contaminated soil. In early 1987, Jasco began extracting
and discharging groundwater from an on-site well to the city sewer system.
Entire Site: In early 1991, the potentially responsible party, under EPA supervision,
completed investigations into the nature and extent of groundwater contamination at
the site. Treatability studies for soil cleanup were completed and, in 1992, a cleanup
remedy was selected to address site contamination. During the winter of 1994, the EPA approved
the installation of a pilot-scale dual vacuum extraction system for the drainage swale area of the
site. The purpose of this pilot test is to evaluate dual vacuum extraction as a remedy for cleanup
of the soil and groundwater. The pilot-scale dual vacuum extraction system currently is being
designed and is scheduled to start operating in 1995.
Site Facts: In 1983, the California Regional Water Quality Control Board requested that Jasco
install a monitoring well to determine if groundwater was contaminated.
Environmental Progress
The removal of contaminated soil in addition to the operation of the interim groundwater
extraction system have reduced the potential of exposure at the Jasco Chemical Co. site while
final remedies are being designed.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995 2 JASCO CHEMICAL CORP.
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JET PROPULSIO
LABORATORY
(NASA)
CALIFORNIA
EPA ID# CA9800013030
EPA REGION 9
Los Angeles County
Pasadena
Site Description
The Jet Propulsion Laboratory (JPL) is a 176-acre site in Pasadena, California. The area is
primarily residential with some light commercial operations. The site is bordered by the San
Gabriel Mountains on the north, an equestrian club and the local Fire Station on the south, a
residential neighborhood on the west, and the Arroyo Seco Dry Wash on the east. The Army
developed and operated JPL between 1945 and 1957. In 1958, jurisdiction was transferred to the
National Aeronautics and Space Administration (NASA). The California Institute of Technology
conducts research and development at JPL under a NASA contract in the areas of aeronautics,
space technology, and space transportation. JPL's primary activities include the exploration of the
earth and solar system by automated spacecraft and the design and operation of the Global Deep
Space Tracking Network. Sources of contamination at the site include approximately 35 seepage
pits where liquid and solid wastes were reportedly disposed of, a settling chamber in the JPL
storm drain system, contaminated soil excavated from part of that system, and an area where
waste solvents were dumped into three separate holes. Hazardous substances located at JPL
include waste solvents, solid rocket fuel propellants, cooling tower chemicals, sulfuric acid,
Freon, mercury, and chemical laboratory wastes. In 1990, JPL detected significantly elevated
levels of contaminants in the groundwater underneath and down-gradient of the site. Due to
volatile organic compound (VOC) contamination in the groundwater, four municipal wells were
shut down between 1989 and 1990 and two Lincoln Avenue Water Company wells were shut
down in 1987. NASA installed a treatment system, and municipal wells began operating again in
October of 1990. The Lincoln Avenue Water Company also has installed a treatment system on
its wells, which are again operational. Approximately 120,840 people live within 4 miles of the
site; an estimated 68,000 people obtain drinking water from municipal wells within 4 miles of the
site.
Site Responsibility:
This site is being addressed through
Federal, State, and local actions.
NPL Listing History
Proposed Date: 02/07/92
Final Date 10/14/92
April 1995
-------
Threats and Contaminants
The groundwater contamination from the JPL has traveled off site and has affected
several drinking water wells, including four municipal drinking wells belonging to the
city of Pasadena and two drinking water wells belonging to the Lincoln Avenue Water
Company. The contaminants are primarily VOCs including trichloroethylene and
carbon tetrachloride. People who touch or ingest contaminated groundwater could be
at risk.
Cleanup Approach
This site is being addressed in four stages: initial actions and three long-term remedial phases
focusing on the on-site groundwater, source control, and off-site contamination.
Response Action Status
Initial Actions: In 1987, two Lincoln Avenue Water Company wells were affected
by groundwater contamination from the JPL and were shut down. A treatment system
has since been installed and the wells are now operational. Between 1989 and 1990,
four wells in the city of Pasadena also were impacted; a treatment system has since been installed
on these wells.
On-Site Groundwater: During an investigation of the on-site groundwater, the
JPL installed several wells to sample the nature and extent of contamination at the
site. The results of the investigation will be used to select a final cleanup remedy,
Source Control: During the summer of 1993, the JPL began investigating sources
of contamination at the site. These studies are primarily focused on the seepage pits
and three other disposal points. The JPL is collecting soil samples from numerous
deep soil bearings and subsurface gas samples to determine which seepage pits are sources of
contamination. The JPL also is investigating the extent of soil contamination. The results of these
investigations are expected to be submitted in late 1995. The selection of a final cleanup remedy
for controlling the source of contamination is anticipated in 1996.
Off-Site Contamination: The JPL has installed several groundwater wells to
determine the nature and extent of contamination off site. The results of these
investigations are expected to be submitted to the EPA in mid-1995, with a final
cleanup remedy for off-site groundwater scheduled for selection in 1996.
Site Facts: The EPA and the JPL have negotiated a Federal Facilities Agreement that requires
JPL to conduct the cleanup efforts at the site.
April 1995 2 JET PROPULSION LABORATORY (NASA)
-------
Environmental Progress
The treatment systems installed on the Lincoln Avenue and Pasadena drinking water wells have
reduced potential risks to human health and the environment while further investigations of site
contamination are being completed at the Jet Propulsion Laboratory (NASA) site.
Site Repository
Not established.
JET PROPULSION LABORATORY (NASA)
April 1995
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JIBBOOM JU
CALIFORNIA
EPA ID# CAD980737613
Site Description
EPA REGION 9
Sacramento County
Sacramento
Other Names:
ity of Sacramento Dump
Associated Metals
PG&E Power Plant
The Jibboom Junkyard site is approximately 9 acres in size, although roughly 7 acres have been
covered by an interstate highway. The site, formerly owned by the Associated Iron and Metals
Company, began operations in 1951. Operations included metal salvaging of a variety of
materials such as railroad cars, army tanks, batteries, and electric transformers. Some scrap
metal was disposed of on site, and transformer oil was poured onto the ground. Operations
ceased in 1965, the same year the California Department of Transportation purchased the
property. The uncovered section of the site is flat, fenced, and includes the portions used by the
original salvage yard and the electric power generating plant property. An old building and the
underground storage tanks of an old electric power generating plant remain, and the other
ancillary structures and storage tanks have been dismantled and removed. The remaining
structures are included within the fenced area. Approximately 250,000 people live within 3 miles
of the site. The bicycle path adjacent to the site receives regular traffic during the week as a
route to and from work. The city's drinking water is taken from the river at the northeastern
corner of the site. The river also is used for recreation and irrigation. The site is in the flood
plain for the Sacramento River.
Site Responsibility:
This site was addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/01/83
Deleted Date: 09/10/91
Threats and Contaminants
Soil was contaminated with lead, copper, and zinc. People faced a health threat if they
inhaled particles, accidentally ingested, or came into direct contact with contaminated
soils prior to cleanup.
April 1995
-------
Cleanup Approach
Response Action Status
Entire Site: In 1983, the site was fenced and soil samples were collected. From 1985
to 1987, over 11,000 cubic yards of contaminated soil were excavated and removed to
an approved hazardous waste disposal facility. The site was deleted from the NPL in
September of 1991.
Environmental Progress
The removal of contaminated soil and fencing has eliminated the potential of exposure to
hazardous materials at the Jibboom Junkyard site. All cleanup measures have been proven
effective and the site was deleted from the NPL in September of 1991.
Site Repository
Contact the Region 9 Superfund Community Relations Office, 75 Hawthore Street,
San Francisco, CA 94105
April 1995
JIBBOOM JUNKYARD
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KOPPERS CO
INC. (OROVILL
PLANT)
CALIFORNIA
EPA ID# CAD009112087
Site Description
EPA REGION 9
Butte County
Oroville
Other Names:
oppers Feather River Plant
Since 1948, the 200-acre Koppers Company, Inc. (Oroville Plant) site was used to conduct wood
treating operations designed to prevent wood deterioration by insects or fungi. Koppers purchased
the plant from the National Wood Treating Company in 1955. Chemical handling procedures and
wood treatment and storage operations have contaminated the soil and groundwater on and off
site. Fires at the Koppers facility occurred in 1963 and 1987, causing increased contamination at
the site. Groundwater, surface water, and soils on and off site have been contaminated with
pentachlorophenol (PCP) and other hazardous substances used in Koppers' wood treating
activities. The contaminated groundwater is located beneath this site and the adjacent Louisiana-
Pacific site (also on the NPL), and in the area south of the Koppers site. In 1973, PCP was
discovered in nearby residential wells that are used as a source of drinking water. In 1988,
Koppers Company, Inc. was bought by the parent company of Beazer East, Inc. Beazer later sold
the wood treating plants to Koppers Industries, Inc.. Koppers Industries, Inc. is the current
owner and operator. However, Beazer is the recognized potentially responsible party.
Approximately 10,650 people live within a 3-mile radius of the site. These people also depend on
groundwater as their source of drinking water. The site is within 1 mile of the nearest water
supply well, and there are other water supply wells within 3 miles of the site. Contamination of
groundwater from site-related chemicals extends 2 miles to the south.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 09/21/84
Threats and Contaminants
Groundwater, surface water, and soil contain PCP, dioxins, furans, creosote,
polycyclic aromatic hydrocarbons (PAHs), and heavy metals including copper,
chromium, and arsenic. Potential health risks include drinking contaminated surface
water or groundwater, or coming into direct contact with or accidentally ingesting
contaminated soils. Residents in this contaminated area currently receive an alternate
drinking water supply.
April 1995
-------
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: Beazer has been providing an alternative water supply to residents
south of the site since 1986. Between 1987 and 1988, the EPA directed the
construction of a temporary asphalt cap over the contaminated soil in the process
area. The cap's function is to stabilize the site and to prevent contact with contaminants after a
fire spread hazardous substances. In 1994, the EPA directed Beazer to build an on-site landfill
for disposal of surface soils containing high levels of dioxins.
Entire Site: The parties potentially responsible for site contamination completed a
study of the site in 1989. The EPA used the results of this study to select the
following methods to address site contamination: removing and treating contaminated
groundwater with a carbon adsorption process; treating the contaminated soil in place; capping
the wood treating area; providing a permanent water supply to those residents with contaminated
wells; and discharging treated groundwater to the aquifer. Two groundwater extraction,
treatment, and discharge systems have been built, one on site and one off site. Both use a carbon
absorption process, with discharge to recharge injection wells. In 1989, the EPA selected three
different treatment technologies to clean up approximately 335,000 cubic yards of contaminated
soil. However, treatability tests conducted during the design phases have shown that the selected
technologies cannot achieve cleanup goals for all contaminants. Beazer will initiate a focused
feasibility study and suggest other cleanup alternatives for soils in 1995. Once the initial soil
treatment systems have been built, Beazer, under EPA oversight, will evaluate their effectiveness
and expand the systems as necessary. All construction activities are expected to be completed by
1996.
Site Facts: In 1982, the State issued two orders to Koppers to clean up contaminated soil and
groundwater at the site. In 1986, the EPA and Koppers signed a Consent Order, which required
the company to conduct a study into the nature and extent of contamination at the site. In
December 1990, Beazer signed a Consent Decree to perform the engineering design and cleanup
activities at the site.
Environmental Progress
The provision of an alternate water supply and construction of the asphalt cap have reduced the
potential of exposure to contaminated drinking water at the Koppers Company site while final
cleanup activities are being completed.
April 1995 2 KOPPERS COMPANY, INC. (OROVILLE PLANT)
-------
Site Repository
Butte Public Library, 1820 Mitchell Ave., Oroville, CA 95965
Meriam Library, California State University at Chico, Chico, CA 95929-0295
KOPPERS COMPANY, INC. (OROVILLE PLANT) 3 April 1995
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LABORATORY
ENERGY-RELA
HEALTH
RESEARCH/OLD
CAMPUS LANDFIL
(USDOE)
CALIFORNIA
EPA ID# CA2890190000
Site Description
EPA REGION 9
Solano County
Davis
The Old Campus Landfill site is a facility that was leased by the U.S. Department of Energy
(USDOE) as the Laboratory for Energy-Related Health Research (LEHR). The 15-acre Old
Campus Landfill is situated on the Putah Plain adjacent to Putah Creek and surrounded by
agricultural land to the south, east, and west. The University of California-Davis (UC-Davis)
campus and the City of Davis are north of the site. LEHR engaged in studies on the biological
effects of bone-seeking radionuclides (strontium-90 and radium-226) in laboratory animals
(beagles) from 1960 to 1989. During the 29 years of operations, LEHR generated and disposed
of radioactive, biologic, and chemical wastes, as well as municipal and laboratory wastes. Dogs
were buried on site in the early years, but later, the dog carcasses were shipped to the Hanford
National Laboratory in Washington State for disposal. Approximately 35,000 gallons of dog
feces contaminated with strontium-90 was disposed of in underground concrete banks. The site
also was used as a landfill area for residential and laboratory waste disposal from the late 1940s
to 1967. The site contains radioactive waste disposal areas for waste generated from campus and
LEHR activities. Records indicate that radioactive wastes with long half lives were buried on site
in trenches and holes. Two separate special liquid radioactive waste treatment and discharge
systems released radionuclides to on-site leach fields. There are 19 municipal wells within 4
miles of the site serving approximately 47,500 people. The nearest resident is approximately 1/2
mile from the site and the estimated population within 4 miles is 41,789.
Site Responsibility:
The site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 01/18/94
Final Date: 05/31/94
April 1995
-------
Threats and Contaminants
Groundwater and soil are contaminated with chloroform and radioactive wastes
including carbon-14 and tritium. Groundwater sampling has found contaminants in 5
of 23 monitoring wells. People coming into contact with or ingesting soil or
groundwater are at risk.
Cleanup Approach
The site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of entire site.
Response Action Status
• Initial Action: The EPA plans to decommission two on-site animal labs, demolish two
buildings, and excavate and remove a disposal tank.
Entire Site: The EPA is planning an investigation into the nature and extent of site
contamination. This investigation will lead to the selection of final cleanup remedies
for the site.
Site Facts: The LEHR facility is classified under the Resource Conservation and Recovery Act
(RCRA) as a large quantity generator.
Environmental Progress
The EPA has determined that the Laboratory for Energy-Related Health Research/Old Campus
Landfill (USDOE) site does not pose an immediate risk to people or the environment while site
studies are being planned.
Site Repository
Not yet established.
April 1995 2 LABORATORY FOR ENERGY-RELATED HEALTH
RESEARCH/OLD CAMPUS LANDFILL (USDOE)
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LAWRENCE
LIVERMORE N
LABORATORY
(SITE 300) (USDOE)
CALIFORNIA
EPA ID# CA2890090002
EPA REGION 9
San Joaquin County
15 miles east of Livermore
Site Description
The 11-acre Lawrence Livermore National Laboratory (Site 300) was developed in the 1950s as a
research facility. It is operated by the University of California for the U.S. Department of
Energy (DOE) primarily as a high-explosives and materials testing site in support of nuclear
weapons research. Approximately 350 people who work in the area are provided with potable
water from a ground water in the area. Most people are laboratory employees and State employees
who work in a nearby State vehicular recreation area. Adjacent ranch houses and a State fire
station also draw drinking water from the aquifer.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 08/30/90
Threats and Contaminants
Groundwater and soil have been contaminated with solvents and other volatile organic
compounds (VOCs). Groundwater also contains tritium. The primary health threat is
drinking contaminated groundwater.
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site. In the fall of 1992, another groundwater extraction and treatment
system was installed for the same purpose but at another location for another VOC plume.
April 1995
-------
Response Action Status
Initial Actions: In spring 1991, DOE installed a groundwater extraction and
treatment system to curtail the migration of the VOC contamination plume. In
another plume of VOC-contaminated groundwater was discovered in 1992, a second
extraction and treatment system was installed. DOE also began capping two landfills to prevent
rainwater runoff from causing contaminant migration.
Entire Site: Site investigations currently are being conducted under the facility's
Environmental Restoration Program. To date, six areas are under investigation:
General Services Area; the Building 834 Complex; Landfill/Pit 6 Area; the High
Explosive Process Area; East and West Firing Areas; and the B833 Complex. These
investigations began in mid-1992 and are expected to be completed between 1995 and 1997.
Results from these investigations will lead to the selection of final cleanup actions for the site.
Site Facts: A Federal Facilities Agreement was signed between the EPA and DOE in June
1992, which outlines DOE's responsibilities for addressing site contamination.
Environmental Progress
The pumping and treating of contaminated groundwater is reducing the exposure to contamination
at the Lawrence Livermore National Laboratory (Site 300) while additional studies are taking
place and final cleanup activities are being planned.
Site Repository
Livermore Public Library, 1000 South Livermore Avenue, Livermore, CA 94550
April 1995
LAWRENCE LIVERMORE
NATIONAL LABORATORY (SITE 300) (USDOE)
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LAWRENCE
LIVERMORE N
LABORATORY
CALIFORNIA
EPA ID# CA2890012584
EPA REGION 9
Alameda County
Livermore
Site Description
The 1-square-mile Lawrence Livermore National Laboratory (LLNL) site is an active multi-
program research laboratory operated by the University of California for the U.S. Department of
Energy. A number of operations at LLNL handle, generate, or manage hazardous materials that
include radioactive wastes. Hazardous waste treatment activities are carried out on site. The site
first was used as a Naval Air Station in the 1940s. In 1951, it was transferred to the U.S. Atomic
Energy Commission and was established as a nuclear weapons and magnetic fusion energy
research facility. In 1984, the California Department of Health Services (CDHS) issued an Order
for Compliance to LLNL to provide alternative water supplies to residents west of the facility,
whose wells had been contaminated by hazardous substances from LLNL. Another NPL site, the
Lawrence Livermore National Laboratory (Site 300), is located 15 miles east of LLNL. There
are approximately 50,000 people living within a 2-mile radius of the site. Private drinking water
wells exist near the site.
Site Responsibility:
This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Both on- and off-site groundwater are contaminated with volatile organic compounds
(VOCs) and chromium. Fuel hydrocarbons including benzene and ethylene dibrorm'de,
the heavy metal lead, and tritium appear only in wells on site. Soil excavated from the
site was contaminated with solvents, radioactive wastes, heavy metals, polychlorinated
biphenyls (PCBs), and fuel hydrocarbons. Soils remaining on site contain VOCs,
tritium, PCBs, fuel hydrocarbons, and inorganic substances. People may face a health
threat if they ingest or come in direct contact with contaminated water or soil.
May 1995
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Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: Initial actions included the excavation and removal of 4,000 cubic
yards of contaminated soil from several waste disposal pits to certified off-site
disposal sites and closure of an inactive landfill, with subsequent removal of
approximately 14,000 cubic yards of contaminated soil. LLNL also provided alternative water
supplies to residents with wells affected by contamination.
Entire Site: In 1989, one of two proposed on-site pilot treatment facilities began
treating groundwater contaminated with VOCs using an ultraviolet light/hydrogen
peroxide treatment technology. The study has shown positive results using a cleanup
process for groundwater known as vacuum-induced venting. Contaminated groundwater from
seven locations on and off site will be pumped to these facilities as well. Additionally, in 1990
LLNL began a pilot treatment study on a major gasoline spill area on-site. In 1992, a remedy
was selected that called for continued pump and treat operations for groundwater, and soil vapor
extraction. In December 1994, the design of the soil vapor extraction at Building 518 was
completed. The design for pumping and treating VOCs at Treatment Facilities G-l and G-2 is
expected to be completed mid-1995. All other pump and treat activities are in progress.
Site Facts: In 1984, the CDHS issued an Order for Compliance to LLNL to provide alternative
water supplies and to investigate groundwater quality at LLNL. In 1987, the California Regional
Water Quality Control Board (CRWQCB) issued an order directing LLNL to investigate and
clean up the on- and off-site contamination. In 1988, LLNL signed an Interagency Agreement
with the EPA, the CDHS, and the CRWQCB to address contamination on and off site.
Environmental Progress
The removal of contaminated soil, provision of alternate drinking water supplies, and use of
groundwater treatment systems have reduced the potential of exposure to contaminated materials
at the Lawrence Livermore National Laboratory (USDOE) site while studies continue and cleanup
activities are being planned. To date, over 110 pounds of VOCs and 10,000 gallons of gasoline
have been removed.
Site Repository
Livermore Public Library, 1000 South Livermore Avenue, Livermore, CA 94550
May 1995 2 LAWRENCE LIVERMORE
NATIONAL LABORATORY (USDOE)
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LIQUID GOLD
CORP.
CALIFORNIA
EPA ID# CAT000646208
EPA REGION 9
Contra Costa County
Richmond
Site Description
The Liquid Gold Oil Corp. site consists of approximately 18 acres of a 29-acre property owned
by Southern Pacific Transportation (SPT). Originally, a major portion of the property was
marshland, which was reclaimed in the 1940s and 1950s. SPT leased approximately 3 acres of
the site to an asphalt manufacturing plant and later to a waste oil storage and transfer facility that
operated under the name of Liquid Gold Oil Corporation. In 1982, Liquid Gold Oil ceased
operations and left several deteriorating buildings and 27 storage tanks of various sizes on the
site. Currently, the site is inactive, with the exception of a pistol firing range. Improper handling
and disposal practices have resulted in soil contamination. The population within a mile is
approximately 7,000, and an estimated 92,000 people live within 4 miles of the site. There are
public wells located within 1/2 mile of the site, and nine private wells located within 3 miles of
the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Soils are contaminated with lead. People may be exposed to a health risk through
accidental ingestion of or direct contact with soils. Adjacent wetlands also may have
been adversely affected by the site.
June 1995
-------
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: In response to inspections and regulatory actions, some surface soil
was removed in 1974, liquid waste and soil from a drainage area and holding pond
were removed in 1980, leaking storage tanks were removed in 1982 and 1983, and
drums were removed in 1984. During late 1989, a wooden building containing lead was
demolished and disposed of, roofing materials containing asbestos were disposed of, non-
hazardous wastes such as wooden pallets and stacked timber were removed, and approximately
655 cubic yards of soil from various on-site areas were excavated and removed.
Entire Site: An investigation into the extent and type of contamination in the soils
and marsh was conducted by the potentially responsible party, under State
supervision. This study led to the selection of final cleanup actions for the entire site
which include capping the remaining contamination from a used oil recycler and excavating
portions of the adjacent wetlands. Cleanup activities are scheduled for completion by late 1995, at
which time monitoring of the cap and the ground water will be conducted.
Environmental Progress
The removal of the contaminated soil, liquid waste, and leaking storage tanks and the demolition
and removal of the building have reduced the potential for exposure to contaminated materials at
the Liquid Gold Oil Corp. site while cleanup activities are underway.
Site Repository
Richmond Public Library, 325 Civic Center Plaza, Richmond, CA 94804
June 1995
LIQUID GOLD OIL CORP.
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LORENTZ BAR
DRUM CO.
CALIFORNIA
EPA ID# CAD029295706
EPA REGION 9
Santa Clara County
San Jose
Site Description
The Lorentz family began a drum recycling operation at the 5 1/2 acre Lorentz Barrel & Drum
Co. (LB&D) site in 1947. Many drums containing residual aqueous wastes, organic solvents,
acids, oxidizers, caustic residues, and oils were received for recycling. During the early years of
operation, portions of the site also were leased to other companies. Between 1950 and 1978, a
drainage ditch carried process wastes to a large sump and other ponded areas in the northern
corner of the property. Wastes from the sump were discharged to a storm drain system.
Sometime between 1968 and 1971, the discharge was diverted to a sanitary sewer; investigations
indicate that this discharge occurred until 1983 or 1984. After this time, liquid wastes were
reportedly evaporated, drummed, and disposed of as hazardous waste along with incinerator ash,
residual liquids, and sludge. Surface runoff was collected and recycled in a drum wash. Since
1981, several investigations have revealed soil and ground water contamination of heavy metals,
organics, and polychlorinated biphenyls (PCBs). The facility was closed in 1987. In late 1987
and 1988, drums and highly contaminated soil were removed from the site, and the 5 1/2 acre
property was partly covered to prevent surface water infiltration, contaminated surface water
runoff, and airborne dispersion of contaminated material. This is one of 28 sites in the South Bay
Area of San Francisco. Facilities at these sites have used a variety of toxic chemicals, primarily
chlorinated organic solvents, which have contaminated a common groundwater basin. Although
the sites are listed separately on the NPL, the EPA has combined cleanup activities at some of
the sites as part of an area-wide approach to the contamination. The closest residence is located
about 700 feet north of the site. Less than 3,000 people live within a 1-mile radius of the site.
The site lies directly above an aquifer which is a major source of drinking water in the San
Francisco Bay area, and three public water supply well fields are located within a mile of the
site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 10/04/89
April 1995
-------
Threats and Contaminants
The ground water is contaminated with heavy metals, pesticides and volatile organic
compounds (VOCs). Soil contains PCBs, heavy metals including arsenic and lead, and
pesticides. Individuals are at risk through inhaling, ingesting, or otherwise coming
into direct contact with contaminated ground water or soils.
Cleanup Approach
This site is being addressed in three stages: immediate actions and two long-term remedial phases
focusing on cleanup of the entire site and groundwater.
Response Action Status
Immediate Actions: In 1988, the California Department of Health Services and the
EPA removed 26,000 drums and 3,000 cubic yards of contaminated soil. Also, the
site was fenced, and most of the site area was paved. In 1994, a group of potentially
responsible parties completed a two-phased removal of contaminated buildings and sumps, debris,
drums, and asbestos waste.
Entire Site: In 1993, the EPA completed an investigation to determine the extent and
type of contamination at the site. Based on the results from this investigation, the EPA
selected a remedy that includes using a soil vapor extraction system to clean
contaminated soil, containing soils using an asphalt-concrete cap, removing underground conduits
and disposing them off site, monitoring soil gas near residences, and imposing land use
restrictions to prevent unauthorized access to the site.
Groundwater: Cleanup remedies were selected in 1988 that included building an
on-site groundwater extraction and treatment system which uses an ozone/ultraviolet
process for organic removal and ion exchange for nickel removal, with discharge of
treated water to a local creek. In 1989, a small-scale pilot study was conducted to test the toxicity
of treated water to freshwater organisms to determine the necessary cleanup levels for nickel. In
early 1991, the potentially responsible parties completed optimization studies. In late 1992,
construction of the system was completed, and full-scale operation and maintenance project
began. Groundwater treatment is expected to continue through 1996.
Site Facts: The California Regional Water Quality Control Board issued a Cleanup and
Abatement Order in 1983. A group of 11 potentially responsible parties signed a Consent Decree
in 1990 to design, construct, and operate a shallow groundwater extraction and treatment system
using an ultraviolet/oxidation technology. In 1992, a group of seven potentially responsible
parties signed an Administrative Order on Consent to perform the immediate actions described
above.
April 1995 2 LORENTZ BARREL & DRUM CO.
-------
Environmental Progress
Removing drams, highly contaminated soil, contaminated structures, sumps, debris, and asbestos
waste, and fencing and paving the site have reduced the potential of exposure to contaminated
materials at the Lorentz Barrel & Dram Co. site. Contaminated groundwater is being treated
while the cleanup of remaining soil contamination is being planned.
Site Repository
Dr. Martin Luther King, Jr. Public Library Reference Desk
180 W. San Carlos Street, San Jose, CA 95113
(408) 277-4815
San Jose State University
One Washington Square, San Jose, CA 95192
(408) 277-2730
At this library, information regarding the site is available at three locations:
Clark Library, Government Publication Desk:
General information regarding the location of Lorentz Superfund site documents.
Walquist Library, Reserve Book Room:
Paper copies of site documents.
Clark Library, Media Center:
Copies of site documents on microfiche.
EPA Superfund Records Center
75 Hawthorne Street, San Francisco, CA 94105
(415) 744-2165
LORENTZ BARREL & DRUM CO. 3 April 1995
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LOUISIANA-PA
CORP.
CALIFORNIA
EPA ID# CAD065021594
Site Description
EPA REGION 9
Butte County
South of Oroville
Other Names:
Georgia Pacific
The Louisiana-Pacific Corp. site consists of two pieces of property located 1/2 mile apart: a
100-acre wood processing plant and a 115-acre landfill. Georgia-Pacific Corporation built the
plant in 1969 and operated it until 1973, when the Louisiana-Pacific Corp. assumed plant
ownership and operation. In 1978, the California Solid Waste Management Board approved a
permit for Louisiana-Pacific Corp. to operate the landfill. The plant is made up of the following
components: a log deck and log deck pond, a sawmill, a kiln dryer, the planing mill, a hardboard
plant, and wood particle storage areas. Prior to 1980, wastewater from the hardboard plant's glue
kitchen was discharged to an unlined pond at the site. Wastewater is now recycled. Until 1988, a
fungicide spray was applied to cut timber several months of each year. In 1973, high levels of
pentachlorophenol (PCP) were discovered in nearby residential wells. By 1983, the groundwater
contaminant plume extended 11/2 miles south of the neighboring Koppers Company, Inc.
(Oroville Plant) wood treating plant, another NPL site. Approximately 10,650 people live within
3 miles of the site and use groundwater as a source of drinking water. Site-related chemicals have
contaminated the shallow aquifer beneath the plant, and possibly, the deeper regional aquifer
beneath the landfill. The Feather River is located approximately 1/2 mile east of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Dust samples showed contamination with PCP, formaldehyde, and other volatile
organic compounds (VOCs). Groundwater is contaminated with PCP, arsenic, and
possibly formaldehyde. Contaminants found in sediments include PCP, dioxins,
furans, heavy metals, and polynuclear aromatic hydrocarbons (PAHs). Surface water
contains PCP, ether, and heavy metals including arsenic, boron, and copper. The only
current health risk is inhalation of air emissions from the hardboard plant. Potential
future exposures that pose a health threat are ingestion or inhalation of vapors from
contaminated groundwater at the plant and landfill, or accidental ingestion of surface
soil at the plant.
April 1995
-------
Cleanup Approach
This site is being addressed in a long-term remedial phase focusing on cleanup of the
groundwater and soil.
Response Action Status
Groundwater and Soil: In late 1990, the EPA chose an interim cleanup strategy.
The interim soil remedy includes site access restrictions, such as a perimeter fence,
deed restrictions on future residential use of the site, and additional soil sampling. The
groundwater remedy includes establishing well permit restrictions, monitoring of on-site wells to
obtain additional information about formaldehyde and arsenic levels in the groundwater at the
site, and construction and monitoring of additional off-site wells if formaldehyde is detected
during the on-site well monitoring. Engineering designs for the interim remedy were completed
in mid-1992. Construction began shortly thereafter and is expected to be completed by 1996. In
the meantime, the EPA is evaluating whether additional cleanup actions are necessary to address
contamination at the site.
Site Facts: In 1991, the EPA issued a Unilateral Order to Louisiana-Pacific Corp. requiring the
company to begin interim cleanup actions at the Louisiana-Pacific Corp. site.
Environmental Progress
The interim actions completed to date have reduced the threat of exposure to contaminated soil
and groundwater while additional information is obtained to determine the need for any further
cleanup actions at the Louisiana-Pacific Corp. site.
Site Repository
Butte County Public Library, 1820 Mitchell Avenue, Oroville, CA 95965
Meriam Library, California State University at Chico, Chico, CA 95929-0295
April 1995 2 LOUISIANA-PACIFIC CORP.
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MARCH AIR
FORCE BASE
CALIFORNIA
EPA ID# CA4570024527
Site Description
EPA REGION 9
Riverside County
Located near Riverside
The 7,000-acre March Air Force Base has been used for aircraft maintenance and repair,
refueling operations, and training activities since 1918. The Air Force conducted a preliminary
investigation of 39 potentially contaminated areas on base which included three fire training
areas, seven inactive landfills, underground solvent storage tanks, an engine test cell, and spills.
Significant contamination was found at seven of the 39 areas. Three regions of groundwater
contamination beneath the base were identified and a well on the base was shut down in 1984.
Groundwater contamination has migrated to wells located off base. These wells are no longer in
use. Approximately 11,600 people obtain drinking water from municipal wells within 3 miles of
the site.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 11/21/89
Threats and Contaminants
Groundwater is contaminated with volatile organic compounds (VOCs). Soils contain
VOCs and heavy metals. Potential health threats may exist for individuals who
accidentally ingest contaminated soils and groundwater. However, the off-site wells
with contamination at levels that exceed state drinking water standards were shut
down, and the private well owners have been provided with bottled drinking water
since the contamination was discovered. The wells on the base were closed in 1988,
and drinking water is being purchased from the Eastern Municipal Water District.
Cleanup Approach
This site is being addressed in five stages: immediate actions and four long-term remedial phases
focusing on cleanup of the entire site, Area 5 and Site 4, the Panero Area, and the remainder of
the base.
April 1995
-------
Response Action Status
Immediate Actions: In 1988, the Air Force closed all contaminated wells on and
off site. Affected residents off site were provided with bottled water. People on site
are provided water through the municipal water system from the Eastern Water
District. In 1989, activities supporting design of a system to remove VOCs from groundwater
began. The contaminated groundwater interception and treatment system was put into operation in
1992. The removal of abandoned underground storage tanks and contaminated soil was completed
by the Air Force in 1992. In 1993, the Air Force began pumping and disposing of free product
floating on the groundwater beneath a fueling system.
Entire Site: In 1990, the Air Force began an investigation to determine the nature
and extent of contamination base-wide. This investigation is scheduled for completion
in 1996.
Area 5 and Site 4: In 1990, the Air Force began an investigation into the
contamination at Area 5 and Site 4 on the base. The Air Force anticipates completing
this investigation in 1995, after which final cleanup actions will be selected.
Panero Area: The Air Force began a study of contamination associated with jet fuel
in the groundwater vadose zone and groundwater at the Panero fueling area of the
base in late 1991. The Air Force anticipates selecting final cleanup remedies based on
Remainder of Base: In 1992, the Air Force initiated an investigation of the areas of
the base outside of area 5, Site 4, and the Panero Area. This investigation is expected
to be completed in 1997.
Site Facts: March Air Force Base is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities. March Air Force Base was classified as a realignment base in the summer of 1993
under the Base Realignment and Closure act. A Draft Environmental Impact Statement for reuse
of about 75 percent of the base land is scheduled to be completed in 1995.
Environmental Progress
Providing an alternate water supply to affected residents and on-site personnel has eliminated the
potential of exposure to contaminated drinking water. The removal of underground storage tanks,
soil, and floating free product, and the treatment of contaminated groundwater continues to
protect residents near the March Ah" Force Base site while investigations leading to the selection
of final cleanup remedies are completed.
April 1995 2 MARCH AIR FORCE BASE
-------
Site Repository
Riverside City and County Public Library, Moreno Valley Branch Library,
25480 Alessandro Boulevard, Moreno Valley, CA 92388
MARCH AIR FORCE BASE 3 April 1995
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MATHER AIR
FORCE BASE
CALIFORNIA
EPA ID# CA8570024143
Site Description
EPA REGION 9
Sacramento County
12 miles east of Sacramento
Other Names:
AC & W Disposal Site
The Mather Air Force Base (MAFB) was first activated in 1918 as a combat pilot training school
and was officially closed on September 30, 1993. Past operation and maintenance of aircraft at
MAFB required the use of toxic and hazardous materials, such as petroleum, oils, lubricants,
solvents and protective coatings. During the course of their use, these materials were disposed of
or spilled onto the ground and into unlined ditches throughout the base. From 1958 to 1966,
trichloroethylene (TCE), waste solvents, and oils were reportedly poured down an underground
pipe. Environmental investigations began at MAFB in 1982 with a records search that identified
23 areas with significant soil contamination. Subsequent investigations identified additional
contaminated areas, resulting in a total of 68 soil areas of concern. These soil areas range from
fire training areas, drainage ditches, waste pits, and asphalt storage areas to underground storage
tank sites. In addition, groundwater is contaminated beneath portions of MAFB. The groundwater
plume extends westward off the base beneath residential and industrial neighborhoods. The
Aircraft Control and Warning (AC&W) Disposal Area is located on the east-central part of the
base between family housing and the aircraft alert apron (a paved area where aircraft were kept
on stand-by status). A groundwater plume contaminated with TCE is associated with the AC&W
Disposal Area. The AC&W Disposal Area was listed on the National Priorities List (NPL) in
July 1987. The entire base was listed on the NPL in November 1989. Approximately 10,000
people live within a 1-mile radius of the site. Approximately 60,000 people within 3-mile radius
of the site depend on groundwater for their main drinking water supplies.
Site Responsibility:
This site is being addressed through
Federal actions, with the Air Force
as the lead agency.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Soil and groundwater contain various volatile organic compounds (VOCs), gasoline,
diesel fuel, metals, pesticides, and other contaminants. There is the potential for
human exposure to these hazardous chemicals by accidentally ingesting, inhaling, or
coming into direct contact with contaminated soil or groundwater. In addition, the
EPA is concerned about the ecological impact of these contaminants.
April 1995
-------
Cleanup Approach
This site is being addressed in four stages: immediate actions and three long-term remedial
phases focusing on cleanup of the AC&W Disposal Area, the landfills, and base-wide
groundwater and soils.
Response Action Status
Immediate Actions: MAFB is taking immediate actions to clean up three soil areas
using soil excavation, bioventing, and air sparging. In addition, MAFB has
completed three drinking water supply projects to provide alternate sources of
drinking water to residents along the western boundary of the base whose domestic wells have
been contaminated by base operations. In 1984, MAFB initially provided bottled water to
residents of Old Placerville Road and Happy Lane. In March 1986, MAFB connected the
Citizens Utility District water supply to four residences on Old Placerville Road and the Camelia
Mather Mobile Home Park (37 units). In July 1987, MAFB provided water from its own
drinking water system via a pipeline to four private residences along Happy Lane.
AC&W Disposal Area: In 1989, the Air Force began investigating the nature and
extent of contamination at the AC&W Disposal Area. Late in 1993, the Air Force
selected a cleanup remedy for the area that includes: pumping and treating the
contaminated groundwater; treating the extracted groundwater by air stripping, and reinjecting the
treated groundwater into the ground. This system is currently under construction and is expected
to be operational in late 1995.
Landfills: Currently, six municipal landfills exist at MAFB. The Air Force
anticipates cleanup actions that will consist of excavation of the smaller landfills and
consolidation of the refuse with a larger existing landfill on the base. The landfills
likely will remain in place and be covered with impermeable caps, which would eliminate the
potential for human contact with the refuse and reduce infiltration. The Air Force is continuing
investigations into cleanup alternatives for the landfills and expects to make a final cleanup
decision in mid-1995.
Basewide Soils and Groundwater: MAFB is currently completing an evaluation
of cleanup alternatives for soil and groundwater contamination throughout the site.
These studies are expected to be completed by 1996, at which time cleanup remedies
will be selected.
Site Facts: Mather Air Force Base is participating in the Installation Restoration Program
(IRP), a specially funded program established by the Department of Defense (DOD) in 1978 to
identify, investigate, and control the migration of hazardous contaminants at military and other
DOD facilities. Mather Air Force Base was approve for closure under the 1988 Defense Base
Closure and Realignment Commission and Congressional Action, which established special
accounts for funding the environmental cleanup at closing bases.
April 1995 2 MATHER AIR FORCE BASE
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Environmental Progress
Excavating and treating soils and providing an alternate water supply to affected residents has
eliminated the potential of exposure to contaminated drinking water and continues to protect
residents near the Mather Air Force Base while studies are being completed and cleanup actions
are being planned.
Site Repository
Sacramento Central Library, 828 I Street, Sacramento, CA 95814
MATHER AIR FORCE BASE
April 1995
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MCCLELLAN A
FORCE BASE
(GROUNDWATE
CONTAMINATIO
CALIFORNIA
EPA ID# CA4570024337
Site Description
EPA REGION 9
Sacramento County
miles northeast of Sacramento
The 2,952-acre McClellan Air Force Base (MAFB) site was established in 1936 and operates
today as an Air Force Logistics Command Base with a primary mission of management,
maintenance, and repair of aircraft, electronics, and communication equipment. The operation
and maintenance of aircraft have involved the use, storage, and disposal of hazardous materials
including industrial solvents, caustic cleansers, low-level radioactive wastes, and a variety of fuel
oils and lubricants. Approximately 170 waste areas and potential release locations have been
identified and divided into 12 subsites. Approximately 22,800 people live within a 3-mile radius
of the site. The closed municipal well served 23,000 people.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Ground water, sludge, and soil have been contaminated with volatile organic
compounds (VOCs). People may face a health risk if they accidently ingest or come
into direct contact with contaminants. People also may be at risk if they eat foods
containing accumulated contaminants or if they inhale contaminated dust.
April 1995
-------
Cleanup Approach
This site is being addressed in six stages: immediate actions and five long-term remedial phases
focusing on cleanup of the entire site, Area A, Area B, Area C, and Area D. The Air Force has
identified Areas B and C have as high priority areas, and has taken immediate actions to reduce
levels of contamination.
Response Action Status
Immediate Actions: In 1989, the Air Force began to undertake several immediate
actions to reduce threats while cleanup studies were underway. Contaminated soil has
been removed from Area B (located in the northwestern area of the base) and
disposed of, and an 11-acre cap was built. A groundwater extraction system to control the plume
at Area B was also built, and a plant was constructed to treat extracted groundwater. An
alternative water supply was provided to 548 residences with hookups to city and county water
supplies. A carbon filtration system was installed for base well 18. A groundwater extraction
system was installed in Area C. Building 666 was demolished and removed, and 59 underground
storage tanks were removed.
Entire Site: An investigation into the extent and type of contamination at the entire
site began in 1989. At the conclusion of the investigation, scheduled for 1996,
recommendations for final cleanup actions will be presented.
Area A: An investigation into the extent and type of contamination at Area A began
in 1989. At the conclusion of the investigation, expected in 1997, recommendations
for final cleanup activities will be presented.
Area B: An investigation into the extent and type of contamination began in 1989. At
the conclusion of the investigation, which is expected to continue for several years,
recommendations for final cleanup actions will be presented. Priority areas have been
identified for interim cleanup and include soil contamination at a plating shop and storage area.
Three soil vapor extraction systems have been installed and are now treating contaminated soils.
The Air Force is cleaning the worst areas of soil contamination first, so as to reduce the future
cost of pumping and treating groundwater contaminated by the chemicals in the soil.
Area C: An investigation into the extent and type of contamination at this area began
in 1990. At the conclusion of this study, recommendations for final cleanup activities
will be presented. A burn pit has been identified as a priority for expedited cleanup.
Expedited efforts are expected to begin over the summer of 1995.
Area D: An investigation into the extent and type of groundwater contamination in
the vadose zone is underway. At the conclusion of the investigation, recommendations
for alternatives for final cleanup will be presented. The Air Force plans to conduct
soil gas treatability studies as part of this investigation.
April 1995 2 - MCCLELLAN AIR FORCE BASE
(GROUNDWATER CONTAMINATION)
-------
Site Facts: In 1989, the EPA, the California Department of Health Services, and the Air Force
signed an Interagency Agreement. McClellan Air Force Base is participating in the Installation
Restoration Program, a specially funded program established by the Department of Defense
(DOD) in 1978 to identify, investigate, and control the migration of hazardous contaminants at
military and other DOD facilities.
Environmental Progress
The removal and disposal of contaminated soil and underground tanks, the capping of the
northwestern area of the base, and the installation and operation of a groundwater extraction
system have reduced the potential for exposure to contaminants at the McClellan Air Force Base
(Groundwater Contamination) site. Providing an alternate water supply has eliminated the
potential for exposure to contaminated drinking water and continues to protect area residents
while studies are taking place and final site cleanup activities are being planned.
Site Repository
Sacramento Public Library, Central Library, 536 Downtown Plaza, Sacramento, CA 95814
MCCLELLAN AIR FORCE BASE
(GROUNDWATER CONTAMINATION)
April 1995
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MCCOLL
CALIFORNIA
EPA ID# CAD980498695
EPA REGION 9
Orange County
Fullerton
Other Names:
Ramparts & Los Coyotes Tracts
Site Description
The McColl site is an inactive refinery-waste disposal facility covering approximately 22 acres.
The site consists of two distinct areas: the Ramparts Area, which is in the eastern portion of the
site and is surrounded by developed property and residences, and the Los Coyotes Area, which is
in the western portion and once had a portion of the Los Coyotes Country Club Golf Course
overlying it. The Ramparts and Los Coyotes Areas each contain six waste sumps with depths up
to 55 feet. Approximately 97,100 cubic yards of contaminated material (72,600 cubic yards of
solid waste and 24,500 cubic yards of contaminated soil) is contained in the waste sumps. The
waste is primarily an acidic sludge waste generated during the refining process for high octane
aviation fuel during the 1940s. Drilling muds were placed over a few of the Ramparts sumps in
the early 1950s. The Los Coyotes area was covered with soil in 1960 to build the Los Coyotes
Golf Course. In 1968, homes were built in the area. Subsequently, complaints from residents
near the site about odors and health problems initiated investigations by local, State, and Federal
agencies. The Ramparts area was covered in 1983 by a temporary liner. Tar like waste continues
to seep to the surface of the dirt cap. Access to the site is restricted by a fence and a security
guard. There are more than 6,700 people living within 3 miles of the site. The distance from the
site to the nearest residence is less than 100 feet.
Site Responsibility:
This is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Air, groundwater, and soil on site contain thiophene compounds, which can cause
severe odors; sulfur dioxide, which can cause respiratory inflammation when inhaled;
and various volatile organic compounds (VOCs) including benzene. The waste
contaminating the air, groundwater and soil is a very acidic. People may face health
risks from direct contact with the waste because of its acidic nature. Inhalation of
emissions of sulfur dioxide and VOCs from the waste also can pose health threats.
Low levels of inorganic chemicals, volatile, and semi-volatile compounds have been
detected in the regional groundwater. Some of these compounds have also been
detected in the soil.
April 1995
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Cleanup Approach
Site cleanup is being addressed in three phases: initial actions and two long-term remedial phases
focusing on cleanup of soil and waste and groundwater.
Response Action Status
Initial Actions: Access to the site is restricted by a fence and a 24 hour security
guard. A temporary cap was placed over portions of the site. Waste that seeps to the
surface of the sumps that is exposed is periodically removed.
Soil and Waste: In 1984, the EPA selected a cleanup remedy including excavation
and disposal of wastes at an approved disposal facility. Groundwater monitoring
wells were installed on site and sampled to determine whether the groundwater had
been contaminated by the soil. A State court injunction in 1985 stopped the transfer of the
contaminated soil. As a result of this injunction, the EPA revised the original study. The EPA
issued a proposed plan in 1989 identifying excavation and thermal destruction as the preferred
cleanup alternative. The EPA then conducted various treatability studies including rotary kiln
incineration, low temperature thermal extraction, solvent extraction, and a trial excavation of the
waste. Based on information gained from these studies, in mid-1993, the EPA again chose to
revise its plan for cleanup; the EPA selected partial solidification followed by landfill closure.
The engineering design work began in the summer of 1993 and is expected to be completed in
late 1995.
Groundwater: In the early 1980's, a limited number of monitoring wells were
installed on site. Samples from these wells produced no conclusive results. In 1986,
the EPA conducted a groundwater investigation. Samples taken during the study
indicated that thiophenes may have leached into the groundwater. A more comprehensive
groundwater investigation began in 1990 to determine the nature and extent of the contamination
and to identify cleanup alternatives. This investigation is scheduled for completion in 1995.
Environmental Progress
The removal of sludge to an off-site landfill and the construction of a fence have reduced the
potential of exposure to contaminated sludge at the McColl site while further studies are
completed and remedy design activities continue.
Site Repository
Fullerton Public Library, 353 West Commonwealth Avenue, Fullerton, CA 92632
April 1995 2 MCCOLL
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MCCORMICK &
BAXTER CREOSOTI
CO.
CALIFORNIA
EPA ID# CAD009106527
EPA REGION 9
San Joaquin County
Stockton
Site Description
McCormick & Baxter Creosoting Co. formerly operated a wood-preserving facility on this
29-acre site located in a light industrial area near the Port of Stockton. Old Mormon Slough, a
tributary to the San Joaquin River, borders the site on the north. Excluding an 8-acre portion of
the site owned and leased by Southern Pacific Railroad Company since the 1950s, McCormick &
Baxter owns the entire property. From 1942 to 1990, McCormick & Baxter treated utility poles
and railroad ties with creosote, pentachlorophenol (PCP), and arsenic compounds. Waste oils
generated from the wood-treatment processes were disposed of on site in unlined ponds and
concrete tanks. In 1977, the California Department of Fish and Game reported a release of
PCP-contaminated surface water runoff from the site that resulted in a fish kill in Mormon
Slough and the Port of Stockton. In 1978, McCormick & Baxter installed two storm water
collection ponds to collect surface water runoff from the site, as well as a perimeter dike around
the site. Between 1983 and 1984, McCormick & Baxter found that soils throughout the site were
contaminated with heavy metals, PCPs, and various constituents of creosote. Soil contamination
extends to depths of 40 feet below ground surface in some areas. Site investigations indicate that
the shallow aquifer is interconnected with the deep aquifer. The deep aquifer is within 4 miles of
the site and provides drinking water to approximately 97,000 people. In 1989, the California
Department of Toxic Substances Control (CDTSC) detected arsenic and PCP air particles on site.
Approximately 105,000 people live and work within 4 miles and people regularly fish in the Old
Mormon Slough and the San Joaquin River.
Site Responsibility:
This site is being addressed through
Federal, State, local, and potentially
responsible parties' actions.
NPL Listing History
Proposed Date: 02/07/92
Final Date: 10/14/92
April 1995
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Threats and Contaminants
ZGJ
Soils and groundwater are contaminated with arsenic, chromium, copper, PCP, and
poly cyclic aromatic hydrocarbons (PAHs), which are constituents of creosote. Arsenic
and PCP have been detected in air particles on site. Individuals who accidentally
ingest or come in direct contact with contaminated soil or groundwater could be at
risk. Surface water contaminated with PCP that spread from the site caused a fish kill
in Mormon Slough and the Port of Stockton.
Cleanup Approach
The site is being addressed in four stages: immediate actions and three long-term remedial phases
focusing on cleanup of the groundwater, soils, and sediment.
Response Action Status
Immediate Actions: Two storm water collection ponds and a perimeter dike were
installed on site in response to a 1978 Cleanup and Abatement Order. McCormick &
Baxter also installed two on-site groundwater extraction wells that discharge water to
the Stockton wastewater treatment plant. In July 1992, EPA emergency staff took measures to
improve site security and to inventory chemicals and sludges remaining on site. EPA completed
demolition of the site in 1994.
Groundwater: In mid-1992, the EPA began an investigation into the nature and the
extent of groundwater contamination at the site. This investigation, scheduled for
completion in late 1995, will lead to decisions about a remedy for final groundwater
Soils: In early 1993, the EPA began a study of the nature and extent of soil
contamination at the site. This study is scheduled to be completed in mid-1995, at
which time remedies for the first phase of soil cleanup will be selected. The EPA
anticipates cleaning up the soil in two phases. The remedy for the second phase of cleanup is
expected to be selected in 1996.
Sediment: The EPA began a study of contaminated sediment in Old Mormon Slough
next to the site in 1993. The next phase of sediments sampling will take place in
1995. The EPA expects to select a final cleanup remedy for sediment in 1996.
April 1995 2 MCCORMICK & BAXTER
CREOSOTING CO.
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Site Facts: The California Regional Water Quality Control Board issued a Cleanup and
Abatement Order to McCormick & Baxter in January 1978. In October 1984, McCormick &
Baxter received a permit to maintain a concrete oily-water treatment tank and a drum storage area
under Subtitle C of the Resource Conservation and Recovery Act (RCRA). With approval from
the CJDTSC, the company completed a RCRA clean closure of the permitted units in 1990. The
storm water collection ponds are under Interim Status as RCRA hazardous waste management
units. Because the owner of this site filed for protection under Chapter 11 of the Federal
Bankruptcy Code in 1988, cleanup of the site is being completed through Federal actions.
Environmental Progress
The installation of the storm water collection ponds, the perimeter dike, and sites security have
reduced threats to public health and safety while site studies are being completed.
Site Repository
Stockton Public Library, 605 North El Dorado Street, Stockton, CA 95203
MCCORMICK & BAXTER,
CREOSOTING CO.
April 1995
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MGM BRAKES
CALIFORNIA
EPA ID# CAD000074120
EPA REGION 9
Sonoma County
Cloverdale
Site Description
The MGM Brakes facility has manufactured and cast aluminum brake components for large
motor vehicles at this 5-acre site since 1965. From 1965 until 1972, hydraulic fluids containing
poly chlorinated biphenyls (PCBs) were used to cast the brakes. Wastewater containing PCBs then
was discharged into a field south of the plant. From 1972 until 1981, the company also
discharged wastewater containing ethylene glycol on site. The ethylene glycol reacts with water
and makes it easy for PCBs already in the ground to travel rapidly over wide areas. In 1981, the
California Regional Water Quality Control Board (CRWQCB) discovered PCB in the soils of the
open field and in the casting plant. The State ordered the company to stop all discharge activity
and to investigate the nature and extent of contamination. Runoff from the site drains into Icaria
Creek, which is a tributary to the Russian River. Intakes on the river, 1 mile from the site,
supply drinking water to Marin and Sonoma Counties. The river also supplies water to farms in
the area for irrigating crops. Approximately 4,280 people live in the surrounding community of
Cloverdale. There are 40 homes located within 1/2 mile of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Air, soils, and the concrete slab in the casting building on site are contaminated with
PCBs. Soil on and off site contains PCBs and xylenes. Volatile organic compounds
(VOCs) were detected in groundwater off site. People could be exposed to hazardous
chemicals from the site by inhaling contaminants released into the air, drinking
contaminated groundwater, or coming in direct contact with contaminated groundwater
or soils. Drainage potentially containing PCBs from the ditch flows into Icaria Creek
and the Russian River during periods of heavy rainfall.
April 1995
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Cleanup Approach
Response Action Status
Entire Site: In 1981, the CRWQCB ordered MGM Brakes to study the nature and
extent of PCB contamination at the site. The company completed its study in 1983,
and the EPA used the results to recommend alternative methods for cleaning up the
site. However, community objections to the remedy and new information on the site led the EPA
to conduct a second study of the site in 1988 and select the following remedies to address
contamination at the site: excavating approximately 15,000 cubic yards of soil contaminated with
high levels of PCBs and disposing of them off site; evaluating the extent of VOC contamination
at the site; if necessary, developing additional cleanup measures; and filling, grading, and
planting the excavated area with vegetation. Cleanup of the soil is complete. Natural attenuation
was the remedy selected for groundwater contamination. It is expected to take approximately
seven years for contaminants in the groundwater to naturally dissipate.
Site Facts: In 1989, the EPA entered into a Consent Decree with MGM Brakes, in which the
company agreed to design and build the remedy selected by the EPA.
Environmental Progress
Construction for all cleanup remedies is complete at the MGM Brakes site. It will take
approximately seven years for the contaminants in the groundwater to naturally dissipate to safe
levels.
Site Repository
Cloverdale Regional Library, 401 North Cloverdale Boulevard, Cloverdale, CA 95425
April 1995 2 MGM BRAKES
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MODESTO
GROUND WATE
CONTAMINATIO
CALIFORNIA
EPA ID# CAD981997752
EPA REGION 9
Stanislaus County
Modesto
Site Description
The Modesto Ground Water Contamination site is related to a dry cleaning facility that leaked
tetrachloroethylene (PCE) into the soil and ground water. The dry cleaning facility discharged
wastewater containing PCE into the sewer system for approximately 50 years, and an unknown
quantity of PCE was released into the subsurface. The old leaky dry cleaning equipment has been
replaced with new modern equipment, and PCE is no longer being discharged into the sewer.
The dry cleaner is located approximately 1,200 feet from a municipal well, which was
contaminated with PCE from the dry cleaner. The City of Modesto began monitoring ground
water in 1984 and Municipal Well 11 was found to be contaminated with PCE above the
allowable drinking water standard. Well 11 was taken out of service by the City and a granular
activated carbon treatment system was installed in June 1991 to remove the PCE contamination
from the ground water. Well 11 was then shut off in October 1994 because it was found to be
contaminated with low levels of naturally occurring uranium that are slightly above the allowable
drinking water level. It is unknown if Well 11 will ever be used again as a source of drinking
water because of the naturally occurring uranium.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 03/31/89
Threats and Contaminants
Ground water and soil at the site are contaminated with PCE and low levels of
naturally occurring uranium. Potential health threats to people include drinking,
eating, breathing, or touching contaminated soil or ground water. To minimize the
possibility of drinking contaminated ground water, Municipal Well 11 has been shut
off, and institutional controls have been implemented to restrict private usage of
ground water. Most of the site is paved to minimize touching or ingesting
contaminated ground water and soil. Breathing volatile PCE fumes is not a significant
risk because the levels of contamination in the air are very low.
April 1995
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Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: Information on the soil and ground water contamination at the site
was collected during a removal assessment in 1990, and a soil vapor extraction
system was installed to address shallow soil contamination. Subsequent investigations
determined that no immediate actions were required and the soil vapor extraction system was
turned off until a final remedy is selected.
Entire Site: EPA completed a Phase 1 investigation and is conducting a Phase 2
investigation to determine the nature and extent of contamination. Once the
investigation is completed, scheduled for early 1996, remedies will be recommended
for final cleanup of the soil and ground water.
Environmental Progress
After adding this site to the NPL, EPA performed preliminary investigations and determined that
no immediate actions were required while the final cleanup is being planned.
Site Repository
Stanislaus Country Free Library
15000 I Street
Modesto, CA 95354
(209) 558-7814
April 1 995
MODESTO GROUND WATER CONTAMINATION
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MOFFETT
NAVAL AIR STA
CALIFORNIA
EPA ID# CA2170090078
EPA REGION 9
Santa Clara County
10 miles north of San Jose
Other Names:
Naval Air Station Moffett Field
Site Description
The 1,500-acre Moffett Naval Air Station site provides aircraft maintenance operations in support
of anti-submarine patrol. There are 19 separate areas of contamination identified by the Navy on
the station, with four areas being clusters of underground tanks or sumps within a geographic
area. Other areas include two landfills and operational areas that led to spills or releases into the
environment. Hazardous materials from aircraft maintenance and base operations, which were
disposed of on base, have caused soil and groundwater contamination. Materials disposed of
include solvents, caustics, acids, polychlorinated biphenyls (PCBs), and aviation fuels. The
closest residence is located 2,000 feet from the site. Approximately 272,000 people depend on
wells within 3 miles of the station as a source of drinking water. Private and public wells are in
use within 3/4 miles of the site. The estuarine wetlands of San Francisco Bay are located adjacent
to the base.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 04/10/85
Final Date: 07/22/87
Threats and Contaminants
Groundwater and soil contain various volatile organic compounds (VOCs). People
who accidentally ingest or come in direct contact with contaminated groundwater or
soils may be at risk. The adjacent wetlands could be harmed if contaminants migrate
off base.
April 1 995
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Cleanup Approach
This site is being addressed in three stages: initial actions and two long-term remedial phases
focusing on base-wide cleanup and source control.
Response Action Status
Initial Actions: Abandoned wells that may be potential conduits for subsurface
cross-contamination have been evaluated and properly closed. Initial source control
measures currently being implemented at Areas 12 and 14 include bioremediation of
contaminated soil and treatment of groundwater through carbon absorption. These interim
activities are expected to be completed in 1996.
Base-Wide: In 1989, the Navy began a thorough investigation to determine the type
and extent of contamination base-wide. The areas being investigated include:
contaminated soil at Areas 12 and 15, the westside aquifers, the eastside aquifer, and
the wetland area. Once the investigations are completed, final cleanup measures will be
recommended for each of the areas.
Source Control: In 1989, the Navy began an investigation to determine the source
of contamination on the base. This investigation is scheduled for completion in early
1997.
Site Facts: Moffett Naval Air Station is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contamination at military and other DOD
facilities. This site is designated a closing base under the Base Realignment and Closure Act.
Environmental Progress
The closure of abandoned wells and the initial treatment of soils and groundwater at Areas 12
and 14 have reduced the potential migration of contaminated soil into the groundwater at the
Moffett Naval Air Station site while studies are taking place and final cleanup activities are being
planned.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995 2 MOFFETT NAVAL AIR STATION
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MONOLITHIC
MEMORIES
CALIFORNIA
EPA ID# CAD049236201
EPA REGION 9
Santa Clara County
Sunnyvale
Other Names:
Advanced Micro Devices
AMD-Arques
Site Description
Monolithic Memories manufactured integrated circuits on this 20-acre site. The facility consists
of four buildings that were used for production, assembly, storage, offices, and laboratories. In
1982, monitoring wells on the site were found to be contaminated with volatile organic
compounds (VOCs). Contamination probably resulted from leaking pipes in solvent waste drains.
The company has removed two subsurface waste solvent tanks and two subsurface acid
neutralization systems. In 1986, under the direction of the State, the company began pumping and
treating the ground water to contain the contaminant plume. The property was purchased by
Advanced Micro Devices (AMD) in 1987, and the company has assumed the ongoing activities.
The contaminant plume has merged with the National Semiconductor plume (located immediately
upgradient of Monolithic). This is one of 28 sites in the South Bay Area of San Francisco.
Facilities at these sites have used a variety of toxic chemicals, primarily chlorinated organic
solvents, which have contaminated a common groundwater basin. Although the sites are listed
separately on the NPL, the EPA intends to combine cleanup activities at some of the sites as part
of an area-wide approach to cleaning up the contamination. Approximately 300,000 people live
within 3 miles of the site and depend on groundwater as their source of drinking water. A
medical clinic is adjacent to the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
The groundwater and soil are contaminated with various VOCs. While there is no
current pathway through which people can come into contact with contaminants,
people who ingest or come into direct contact with contaminated groundwater or soil
may be at risk.
April 1995
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Cleanup Approach
Response Action Status
Immediate Actions: Under State oversight, Monolithic Memories has been
extracting and treating groundwater since 1986.
Entire site: Monolithic Memories completed an investigation determining the type
and extent of contamination at the site. Based on the results of the investigation, the
EPA selected remedies for the final cleanup of the site which include continuing to
extract and treat the contaminated groundwater and treating contaminated soil through vapor
extraction. Cleanup activities are underway and are expected to be completed in 1995.
Site Facts: The site is being cleaned up under orders from the California Regional Water
Quality Control Board.
Environmental Progress
Construction for all cleanup remedies is complete. The groundwater extraction and treatment
system continues to reduce the potential for exposure to contaminated groundwater at the
Monolithic Memories site while cleanup of soil contamination continues.
Site Repository
Santa Clara City Library, Central Library, 2635 Homestead Road, Santa Clara, CA 95051
Cal Regional Water Quality Control Board, 2101 Webster Street, Suite 500, Oakland, CA 94612
April 1995
MONOLITHIC MEMORIES
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MONTROSE
CHEMICAL CORP
CALIFORNIA
EPA ID#CAD008242711
EPA REGION 9
Los Angeles County
Torrance
Site Description
The 13-acre Montrose Chemical Corp. site was the location of a plant that manufactured the
pesticide DDT from 1947 until 1982. Operations included formulating, grinding, packaging, and
distributing the pesticide. Various locations across the site were used for storage of either DDT
or waste products. Montrose used large quantities of monochlorobenzene (MCB) as a reactant in
the process of making DDT. MCB is a dense non-aqueous phase liquid (DNAPL) which is
heavier than water and does not readily dissolve in it. Much of the MCB remained unreacted and
was released into the ground through a settling and recycling pond. The area used as a settling
and recycling pond for process wastes was completely unlined until 1970, when it was lined with
concrete. In 1985, Montrose regraded and paved portions of the site with asphalt to reduce the
further migration of contaminants until final cleanup of the site. DDT dust was dispersed from
the facility during the time of its operation and may be present in surface soils or dust outside the
plant boundaries. In 1993 and 1994, EPA also discovered fill material in the backyards of two
homes on 204th Street in Torrance. This fill, which was laid down prior to homes being built in
the 1950s, was found to contain bowling ball-sized chunks of technical grade DDT. Four
different aquifers under the site are contaminated with MCB and DDT. These aquifers are largely
interconnected. The upper two aquifers are not drinking water sources, whereas the lower
aquifers are used for drinking water; however, none of the wells within the Montrose plume is
currently being used due to the contamination. The closest drinking water well is located 2 miles
southeast of the site and draws water from the two deepest aquifers. Stormwater flows from the
site into the Normandie Avenue Ditch, the Kenwood Drain, the Torrance Lateral, the Dominquez
Channel, the Consolidated Slip and, finally, the Los Angeles Harbor. Approximately 3,000
people live or work within 1/4 mile of the site. The Del Amo Superftmd site is located
immediately adjacent to the Montrose site, and groundwater contamination from the two sites has
merged.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 10/04/89
April 1995
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Threats and Contaminants
Soils, surface water, and groundwater are contaminated with DDT, MCB, and volatile
organic compounds (VOCs). Storm drain and sewer sediments are contaminated with
DDT. People living or working in an area with DDT in the soil or dust may be
exposed to the chemical in any of three ways: ingestion of contaminated soil;
inhalation of contaminated dust; or direct contact with contaminated soil. The
concentrations of DDT are not high enough to produce any immediate health effects,
but there is an increased risk of cancer for individuals exposed to the contaminated
dust or soil over a long period of time. Without cleanup, the MCB, which contains
dissolved DDT, may continue to migrate in the groundwater in all four aquifers,
potentially reaching drinking water wells and threatening the loss of the groundwater
resource. In addition, sediments contaminated with DDT may still be present along the
stormwater pathway or in the Los Angeles Harbor and may pose a threat to biota and
wildlife.
Cleanup Approach
This site is being addressed in two stages: interim actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Interim Actions: In 1985, Montrose built a temporary asphalt cap over some of the
contaminated soil areas at the former plant. EPA has relocated the residents from
their homes on 204th Street and is expected to remove DDT-contaminated fill in
1995. In September 1992, EPA approved a removal action to address DDT contamination in the
sanitary storm sewer that was studied and evaluated by Montrose. The action was delayed until
the installation of a replacement sewer line was completed by the County of Los Angeles. The
sewer cleanup is scheduled to begin in the summer of 1995. EPA is scheduled to begin a
sampling of dust and soils in neighborhoods near the former Montrose facility in late 1995. If
unacceptable levels of DDT are found, an appropriate removal action will be implemented.
Entire Site: Montrose Chemical Corporation, under EPA oversight, is conducting an
investigation to determine the nature and extent of contamination at the site, including
areas on and off the property and in the sanitary sewers. EPA expects that Montrose
will complete the portion of the investigation that will lead to an interim groundwater remedy in
mid-1995. This interim action should contain the groundwater in the vicinity of the Montrose site
and prevent contamination from migrating further, allowing EPA to finish studies on the final
remedy for groundwater. The interim groundwater remedy also will provide an alternative to
address DNAPL contamination. If some of the DNAPL becomes more mobile during attempts to
clean it up, it will be contained by this interim action. The investigation will then continue to
propose further remedies, including the methods for addressing remaining groundwater
contamination, as necessary. In 1995 and 1996, EPA is expecting to integrate the Del Amo
Superfund site groundwater investigation with the Montrose investigation, so that a final
April 1995 2 MONTROSE CHEMICAL CORP.
-------
groundwater remedy can be selected that addresses the merged plumes. Montrose Chemical
Corporation is performing feasibility studies, under EPA oversight, which evaluate options for
the final groundwater remedy and for the soils that are contaminated with DDT and MCB.
Remedies for the pure DNAPL will be evaluated by Montrose and EPA once the interim
groundwater remedy is in place. After problems with Montrose's investigation, EPA took over
the investigation of DDT-contaminated sediments in the stormwater drainage pathway leading
from the former Montrose facility to the Los Angeles Harbor, which includes the Normandie
Avenue Ditch, the Kenwood Drain, the Torrance Lateral, the Dominquez Channel, and the
Consolidated Slip. EPA is conducting an ecological evaluation, which is expected to be completed
in 1995, and a remedy, if needed, is expected to be selected in 1996.
Site Facts: In 1983, EPA issued an Administrative Order requiring Montrose Chemical to cease
all discharges of DDT and to initiate a study to determine the nature and extent of contamination.
In 1985, 1987, and 1989, the EPA and Montrose signed additional orders requiring Montrose to
expand its studies. In 1994, EPA ordered Montrose to perform the cleanup of DDT-contaminated
fill from the backyards of residents on 204th Street. A health clinic for community members has
been established with an Agency for Toxic Substances and Disease Registry (ATSDR) grant near
the Del Amo Facility and Montrose Chemical Corp. sites. The clinic will test residents for
exposure to chemicals such as benzene and DDT to determine if a link exists between the sites
and residents' health effects. The clinic opened for residents in January 1995 and is scheduled to
run for three years. Workgroups made up of health officials, community members, and
physicians will ensure that the clinic continues to meet the needs of the community.
Environmental Progress
The construction of the asphalt cover has reduced the potential of exposure to contaminated soil
at the Montrose Chemical Corp. site while studies are taking place and interim and final cleanup
activities are being planned.
Site Repository
Carson Public Library, 151 East Carson Street, Carson, CA 90745
MONTROSE CHEMICAL CORP. 3 April 1995
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NATIONAL
SEMICONDUCTOR
CORP.
CALIFORNIA
EPA ID#CAD041472986
Site Description
EPA REGION 9
Santa Clara County
Santa Clara
The National Semiconductor Corp. manufactures electronic equipment at this 50-acre site.
Underground storage tanks, sumps, and pipes are suspected to be the source of contaminated
groundwater and soil. National Semiconductor has taken leaking tanks out of service, instituted a
program of pumping and treating the groundwater, and removed contaminated soil from selected
areas of the facility. This is one of 28 NPL sites in the South Bay Area of San Francisco.
Facilities at these sites have used a variety of toxic chemicals, primarily chlorinated organic
solvents, which have contaminated a common groundwater area. Although the sites are listed
separately on the NPL, the EPA intends to combine cleanup activities at some of the sites as part
of an area-wide approach to the contamination. Approximately 300,000 people live within 3 miles
of the site and depend on groundwater as a source of drinking water.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Volatile organic compounds (VOCs) have contaminated the soil and shallow
groundwater. People who accidentally ingest or come in direct contact with
contaminated groundwater or soils may be at risk; however, there is no current
pathway by which people can come into contact with contaminants.
April 1995
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Cleanup Approach
This site is being addressed in two stages: immediate actions and two long-term remedial phase
focusing on cleanup of the entire site and the source of contamination.
Response Action Status
Immediate Actions: In 1982, 36 cubic yards of soil and a waste solvent tank were
removed. Since 1982, approximately 400 cubic yards of chemical-bearing soils have
been removed. The company initiated a program of pumping and treating the
groundwater to contain the contaminated plume while further site studies are underway.
Entire Site: In 1989, National Semiconductor began investigating the type and extent
of contamination at the site. The investigation was completed in 1991, and the EPA
selected the final remedy for the site. Construction of the remedy began in 1991. The
final cleanup remedy, which includes soil vapor extraction and operation of the groundwater
extraction and treatment system, is underway and will continue for many years until cleanup
goals are met.
Source Control: An investigation to determine the nature and extent of the source
of contamination at the site was completed in 1991. The remedy chosen to address
source contamination is soil vapor extraction. The California Regional Water Quality
Control Board (CRWQCB) is currently treating the three most contaminated areas of the twelve
source areas, and the remaining nine areas are expected to be operational in late 1995.
Site Facts: This site is being cleaned up under cleanup orders from the CRWQCB.
Environmental Progress
The removal of contaminated soil and the operation of a groundwater pump and treatment system
and soil vapor extraction have reduced the potential of exposure to contamination at the National
Semiconductor Corp. site while final cleanup activities are underway.
Site Repository
Santa Clara City Library, Central Library, 2635 Homestead Road, Santa Clara, CA 95051
Regional Water Quality Control Board in Oakland
April 1995 2 NATIONAL SEMICONDUCTOR CORP.
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NEWMARK
GROUNDWAT
COIMTAMINATIO
CALIFORNIA
EPA ID# CAD981434517
Site Description
EPA REGION 9
San Bernardino County
San Bernardino
Other Names:
North San Bernardino Muscoy Site
San Bernardino - Muscoy Area
The Newmark Groundwater Contamination site consists of two areas of groundwater
contamination and a World War II Army base, which has been developed for light industry and
residential uses. The two groundwater plumes border Shandin Hills. On the east side of the site,
a contaminated groundwater plume extends for 5 miles and is referred to as the Newmark Plume
area. On the west side of Shandin Hills is a 4-mile long contaminated groundwater plume known
as the Muscoy Plume area. The site covers a portion of an essential groundwater aquifer
underlying the City of San Bernardino. Groundwater contamination from Norton Air Force Base
is not considered part of this site. Although the suspected disposal occurred in the 1940s, the
problem was not discovered until a water supply monitoring program was instituted in 1980. The
discovery of contaminants, including chlorinated solvents, tetrachloroethylene (PCE), and
trichloroethylene (TCE), resulted in the closing of 20 water supply wells within a 6-mile radius
of the site. The State brought 12 of the wells back into operation by installing air stripping towers
on eight wells and carbon filtration systems on the other four. More than 25 percent of the
municipal water supply for the City of San Bernardino's 175,000 residents has been affected by
the advancing contamination plumes. The City of Riverside, with a population of approximately
250,000, relies on wells downgradient from the Newmark plume for approximately 75 percent of
its total water supply. The rapidly growing communities of Colton, Loma Linda, Fontana, Rialto,
with approximately 115,000 people, and several unincorporated areas also use well water
unprotected from the contamination. No alternative water sources currently are available.
Site Responsibility:
This site is being addressed through
Federal and municipal actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 03/31/89
Threats and Contaminants
Groundwater contains volatile organic compounds (VOCs) including TCE and PCE.
People who drink or come into direct contact with contaminated groundwater may
suffer adverse health effects.
March 1995
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Cleanup Approach
This site is being addressed in three stages: an immediate action to inhibit further spread of the
two contaminant plumes and three long-term remedial actions addressing the Newmark Plume
Area, the Muscoy Plume Area, and the source of the contamination.
Response Action Status
Immediate Action: In May 1992, the EPA conducted a soil gas investigation to
evaluate the need for a removal action at a potential disposal site in a residential
neighborhood. It was confirmed that a disposal trench existed but no VOCs were
present. In-home air sampling confirmed that volatile contaminants from the groundwater were
not detectable in residences above the contaminated groundwater. In October 1993, EPA
conducted a state-of-the-art subsurface survey over several acres to investigate a potential military
equipment disposal area. No buried waste was discovered.
Newmark Plume Area: An investigation was initiated in 1990 to identify the
source of the contaminant plume on the east side of the Shandin Hills, and to identify
ways to control continued down-gradient migration of the plume while removing
contaminants. The investigation determined that the contamination originated at least 2 miles
upgradient of the site in another portion of the valley. A remedy was chosen in 1993 to pump
and treat nearly 18 million gallons of contaminated water per day. This action will control the
spread of contamination into clean parts of the aquifer and prevent additional contaminants from
entering this part of the valley. The water will be treated by conventional activated carbon
adsorption technology to meet all drinking water standards. The treated water will be delivered
to the local municipal water departments, which will bear the majority of the operating costs.
Design of the remedy began in 1993 and is scheduled to conclude in early 1995. It is expected
that the cleanup actions will take approximately 30 years.
Muscoy Plume Area: The investigation of the Muscoy area began in 1992,
identifying the source or sources of contamination and determining how to control the
migration of the plume. In 1994, the EPA separated the Muscoy Area into two
projects: the Muscoy Plume, targeted at controlling the spread of contamination into clean areas;
and the Source project, which will address final cleanup of the source of contamination
(described on the next page). The remedy for the Muscoy Plume is expected to be selected in
early 1995. The preferred remedies involve pumping of approximately 9 million gallons per day
from the leading edge of the plume, treating the water with conventional technologies to drinking
water standards, and delivering the treated water to local water departments.
March 1995 2 NEWMARK GROUNDWATER
CONTAMINATION
-------
Source Control: The suspected source of site-wide contamination is the former
WWII army base, Camp Ono, which closed in 1947 and has been developed for light
industry and residential uses. The base covered over 1,600 acres and had been
largely undeveloped until the 1980s. A San Bernardino County landfill and several industrial
operations are also located in this portion of the San Bernardino Valley. The U.S. Department of
Defense and the EPA have been working closely with the Army Corps of Engineers and San
Bernardino County Solid Waste Department to perform an investigation into the nature and extent
of contamination. The investigation to date has included research of military archives, numerous
interviews, seismic and magnetometer surveys of the subsurface, and construction of four
monitoring wells. Once the investigation is completed, scheduled for late 1996, a final cleanup
remedy will be selected.
Environmental Progress
After adding this site to the NPL, the EPA performed preliminary investigations and determined
that no immediate actions were required at the Newmark Groundwater site while studies are
ongoing and final cleanup activities are being planned. However, the San Bernardino Municipal
Water Department has constructed and operated four wellhead treatment systems to ensure the
safety of the public water supply.
Site Repository
San Bernardino County Public Library, 104 West Fourth Street, San Bernardino CA 92415
San Bernardino Valley Municipal Water District Office, 1350 South '£' Street,
San Bernardino CA 92412
NEWMARK GROUNDWATER
CONTAMINATION
March 1995
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NORTON AIR
FORCE BASE
CALIFORNIA
EPA ID# CA4570024345
EPA REGION 9
San Bernardino County
San Bernardino
Other Names:
Area II Landfill
Site Description
The 2,003-acre Norton Air Force Base site began operations in 1942 and has served as a major
overhaul center for jet engines and the general repair of aircraft. The site formerly had the
responsibility of providing maintenance and logistics for liquid-fuel intercontinental ballistic
missiles. Past hazardous waste management practices may have contributed to existing
contamination problems throughout the base. The practices include burial of drums and other
unspecified materials; disposal of waste oils, solvents, and paint residues into landfills, unlined
pits, ponds, and drying beds; storage of contaminants in leaking underground tanks; and spills of
gas, oils, solvents, polychlorinated biphenyls (PCBs), and acids. There are more than 20 areas of
contamination on the base including two landfills, six discharge areas, four chemical pits, a fire
training area, a fuel spill area, a PCB spill area, a chemical spill area, two waste storage areas,
an underground storage tank area, and a rumored low-level radioactive waste burial site. The
base was closed in March 1994. It is currently undergoing cleanup and conversion to private use.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Groundwater contains various volatile organic compounds (VOCs), such as
trichloroethylene (TCE). Soil also is contaminated with VOCs, PCBs, and heavy
metals including chromium, arsenic and copper. People who accidentally ingest or
come into direct contact with contaminated ground water or soils may be at risk.
However, drinking water wells show no contamination.
March 1995
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Cleanup Approach
This site is being addressed in five stages: immediate actions and four long-term phases focusing on
cleanup of the entire site; the central base area; the northeast area; and the industrial wastewater
treatment plant and golf course area.
Response Action Status
Immediate Actions: In 1986, the Air Force removed the industrial wastewater
treatment plant sludge drying beds. A well contaminated with low levels of VOCs is
being monitored. In 1989, 24 underground storage tanks were removed. The removal of
the floor in Building 763 was completed in late 1992. A new floor was placed in the building, which
is currently leased to the San Bernardino International Airport authority.
Entire Site: In 1989, the Air Force began an investigation into the nature and extent of
contamination. In 1993, 44 areas of contamination were identified. A full
characterization of contamination in each of these areas is continuing.
Central Base Area: In 1992, the Air Force completed an investigation into the nature
and extent of contamination at the central area of the base. The selected remedy includes
a pump and treat system, which was installed in 1992 and has since been expanded to
control the source of the TCE groundwater plume.
Northeast Area: In 1991, the Air Force began an investigation to determine the nature
and extent of contamination in the northeastern area of the base. Several potential sources
of groundwater contamination have been identified. The investigation is scheduled to be
completed in 1996, at which time remedies to clean up the northeast area of the site will be selected.
Industrial Wastewater Treatment Plant and Golf Course Area: In 1989, the Air
Force began an investigation of the industrial wastewater treatment plant and golf course
areas to determine the type and extent of contamination. Contamination attributed to the
treatment plant is being identified. The investigation is scheduled for completion in 1996. Cleanup
plans to address contamination will be selected based on the investigation results. The waste water
treatment plant has been removed.
Site Facts: In 1986, the California Regional Water Quality Control Board issued a Cleanup and
Abatement Order, requiring Norton to clean the Industrial Wastewater Treatment Plant Sludge
Drying Beds. Norton Air Force Base is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities. Norton Air Force Base was closed in 1994 under the Base Realignment and Closure Act.
March 1995 2 NORTON AIR FORCE BASE
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Environmental Progress
The cleanup of the sludge drying beds, the removal of underground storage tanks, and the
installation of a groundwater pump and treat system have reduced the potential for exposure to
contaminants at the Norton Ak Force Base site while further studies are taking place and cleanup
activities are being planned. The Base Boundary Pump Treat System is completed and operating. A
new and expanded radioactive survey of the base is underway.
Site Repository
Norman F. Feldhym Central Library, 555 West 6th Street, San Bernardino, CA 92410
NORTON AIR FORCE BASE
March 1995
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OPERATING
INDUSTRIES, IN
LANDFILL
CALIFORNIA
EPA ID# CAT080012024
EPA REGION 9
Los Angeles County
Monterey Park
Other Names:
Monterey Park Landfill
Oil
Site Description
The Operating Industries, Inc. (Oil) Landfill site is located approximately 10 miles east of
downtown Los Angeles. The Pomona Freeway divides the 190-acre site into two parcels. The
Monterey Park Disposal Co. began landfilling operations at the site in 1948, and in the 1950s,
Operating Industries, Inc. purchased the landfill and continued operations. The landfill is
currently owned by OIL Over the life of the landfill, many wastes have been disposed of,
including residential and commercial refuse, liquid wastes, and various hazardous wastes. In
January 1984, the State of California placed Oil on the California Hazardous Waste Priority List.
The landfill stopped accepting wastes and was closed in late 1984. The U.S. EPA proposed Oil
to the NPL in the same year, and began conducting studies and taking actions to protect the local
environment and those who live near the site. Approximately 23,000 people live within 3 miles
of the site, and 2,100 people live within 1,000 feet of the landfill.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
7E
Air, groundwater, soil, and leachate contain various volatile organic compounds
(VOCs). Potential health threats include inhalation of gases and direct contact or
accidental ingestion of contaminated groundwater, soils, or leachate. There is also the
potential for an explosion or fire at the site.
April 1995
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Cleanup Approach
This site is being addressed in five stages: emergency actions and four long-term remedial phases
focusing on cleanup of the entire site, leachate management, installation of a gas control and
landfill cover, and site control and monitoring.
Response Action Status
Emergency Actions: The EPA fenced the site and posted a guard to keep
trespassers from coming into contact with hazardous substances. The EPA has
conducted a number of emergency actions, including rehabilitation of the main gas
flare station, slope stability and erosion control improvements, surface runoff and drainage
improvements, and off-site trucking and treating of the leachate collected at the site.
Approximately 51/2 million gallons of leachate have been collected to date.
Entire Site: The EPA initiated an investigation in 1989 to explore the nature and
extent of groundwater contamination beneath the landfill and to select final remedies
to cleanup the entire site. The EPA has installed 45 groundwater monitoring wells
around the boundary of the landfill. Groundwater samples are taken regularly from these wells
and sent to laboratories for analysis to determine the levels of the groundwater contamination at
or near the site. The results of the first phase of the study show that some of the groundwater
near the boundary of the landfill is contaminated beyond the area where contaminants previously
had been detected. New wells will be installed beyond the area where contaminants have been
detected so the extent of contamination can be more fully defined. Once the groundwater
sampling is completed, the EPA will conduct a more detailed study and decide what remedy is
appropriate. In addition to groundwater cleanup, the final remedy will address the long-term
operation and maintenance of all site systems. Final cleanup remedies are expected to be selected
in late 1996.
Leachate Management: Approximately 300 million gallons of liquid industrial
wastes were disposed of in the landfill. Leachate forms from these liquids as they mix
with water at the site. If this leachate is not controlled, it may contaminate the soil,
surface water, or groundwater. Currently, leachate is collected and stored in temporary on-site
tanks and then removed by trucks for off-site treatment and disposal. In 1991, construction of an
on-site leachate treatment plant began on the North Parcel, away from homes. Following start-up
and testing, the plant began operating in late 1991. Cleanup activities are expected to be
completed in the fall of 1995. Only liquids from the site are being treated at this plant.
April 1995 2 OPERATING INDUSTRIES, INC. LANDFILL
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Gas Control and Landfill Cover: In 1990, the EPA amended the remedy selected
to address landfill gas migration. Three site systems were selected, which include a
system for gas control, a landfill cover, and surface water management. The gas
control system will control both surface emissions and subsurface movement of gas coming out of
the landfill. The system will include new gas extraction wells, new gas piping, additional gas
destruction capacity, and monitoring facilities. A landfill cover system also will be designed and
built to help prevent the movement of gas through the surface of the site and to decrease odors,
dust, and landfill gas emissions. The cap also will keep water and oxygen out of the landfill, and
will be designed to prevent erosion and movement of material down the slopes of the site. The
addition of the landfill cover also will enhance the overall effectiveness of the gas control system,
and will improve the appearance of the site. To the extent possible, vegetation will be planted
over the cover. The surface water management system will ensure that the potential for runoff of
landfill contaminants during rainfall is limited. Design of these remedies began in 1992 and is
expected to be completed in late 1996.
Site Control and Monitoring (SCM): A variety of daily site activities are
necessary to maintain the landfill and the existing environmental control facilities.
These activities include the operation of the existing gas control systems and flares to
destroy the extracted gas; maintenance of the soil cover, access roads, drainage facilities, and
security fences; and monitoring of the environment both on and off the site. SCM activities also
include several improvements to the existing site control systems such as repairs and
modifications to the gas flare system to allow for better operation, increased capacity, and
improved destruction efficiency of landfill gas. Activities also include installation of new gas
recovery wells and monitoring probes to allow more gas to be collected, repairs to the gas
control system at different on-site locations to improve collection of landfill gas, tests of different
types of landfill cover components and vegetation, and improvements to the site irrigation
system. These site control and monitoring activities have been going on since 1987.
Site Facts: In 1989, a Consent Decree was entered into by the EPA and over 100 companies
that disposed of waste at the site. A number of these companies formed a cooperative group,
referred to as the Steering Committee, to address the contamination at the site. In March 1992,
another Consent Decree was entered into by the EPA and the potentially responsible parties,
requiring the potentially responsible parties to implement, under EPA's supervision, major
portions of the gas control and landfill cover remedies selected by the EPA.
Environmental Progress
The fencing of the site, removal of leachate, and the other emergency actions to control
flammable site gases have reduced the potential threats from contaminated materials at the
Operating Industries, Inc. Landfill site while studies are taking place and final cleanup activities
are being planned.
OPERATING INDUSTRIES, INC. LANDFILL 3 April 1995
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Site Repository
Montebello Regional Library, 1550 West Beverly Boulevard, Montebello, CA 90640
April 1995 4 OPERATING INDUSTRIES, INC. LANDFILL
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PACIFIC CO
PIPE LINES
CALIFORNIA
EPA ID# CAD980636781
EPA REGION 9
Ventura County
Fillmore
Other Names:
Fillmore Texaco Refinery
Site Description
From 1920 to 1952, the 100-acre Pacific Coast Pipe Lines site was operated by Texaco as an oil
refinery. During this time, refinery wastes were deposited into unlined waste pits. The largest
waste pit was located on the western boundary of the site. In 1980, Texaco requested permission
from the Los Angeles Regional Water Quality Control Board (LARWQCB) to use refinery wastes
to resurface on-site service roads. During site investigations, the LARWQCB detected lead at the
site. Between 1981 and 1984, Texaco performed an environmental assessment of the site. Soil
and groundwater were found to be contaminated with heavy metals and volatile organic
compounds (VOCs). Approximately 10,000 people obtain drinking water and as many as 4,000
acres of agricultural land are irrigated from wells within 3 miles of the site. The site is secured
by a barbed-wire fence. The Santa Clara River is located within 1 mile of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 10/04/89
Threats and Contaminants
Groundwater and soil are contaminated with heavy metals and VOCs. People who
accidentally ingest or come in direct contact with contaminated soil or groundwater
may be at risk.
June 1995
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Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1986, Texaco excavated the main waste pit and other
smaller areas and transported the soil to a federally-approved hazardous waste storage
facility.
Entire Site: Pacific Coast Pipelines conducted an investigation into the nature and
extent of contamination at the site under EPA oversight. A final cleanup remedy was
selected in 1992 that called for groundwater treatment through solvent extraction.
Treatability studies and the design of the remedy were completed in 1994. Cleanup actions began
in 1995.
Environmental Progress
The excavation of the main waste pit and the removal of the contaminated soil have reduced the
potential for exposure to contaminants at the Pacific Coast Pipe Lines site while cleanup activities
are underway.
Site Repository
Fillmore City Hall, 524 Sespe Road, Fillmore, CA 93015
June 1995
PACIFIC COAST PIPE LINES
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PURITY OIL
SALES, INC.
CALIFORNIA
EPA ID#CAD980736151
EPA REGION 9
Fresno County
112 mile south of Fresno
Site Description
The approximately 7-acre Purity Oil Sales Inc. site operated as a used oil reprocessing facility
from 1934 until 1974. The oil and by-products from the refining process were collected and
stored in sumps and storage tanks and were disposed of on site in sludge pits. Waste oil sludge
was used by local farmers for dust control or buried in on-site unlined pits and ponds.
Contamination problems resulted from the improper storage and disposal of wastes. Numerous
surface spills occurred during site operations. In 1973, Purity Oil began to empty and backfill the
waste pits. Although the waste pits were backfilled with construction debris, there is no evidence
that the pits were emptied. In 1976, a fire at the site destroyed the main warehouse building and
adjacent equipment. The remaining equipment was removed from the site, and the area was
partially regraded. Seven aboveground steel tanks were left on site. The tanks are believed to
have been used to store oil prior to reprocessing and during the acidification process. One of the
tanks had an exterior asbestos coating. Although the tanks were not leaking severely, all of the
tanks were rusting. All buildings and tanks have been removed from the site, and the site has
been fenced. By 1982, the site was abandoned. Approximately 180 residents live hi an adjacent
trailer park. The Fresno Aquifer, designated as a sole source aquifer, provides water for
municipal, industrial, and agricultural purposes, as well as for a number of private wells. A
number of properties in the area were affected and are now served by the Fresno and Malaga
water districts. The site is located in the San Joaquin River drainage basin, and the San Joaquin
River is 12 miles north of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
April 1995
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Threats and Contaminants
Groundwater is contaminated with various volatile organic compounds (VOCs) and
heavy metals including iron and manganese. Sediment samples taken from the North
Central Canal indicate the presence of lead. Soils are contaminated with phenols,
polychlorinated biphenyls (PCBs), pesticides, oil and grease, VOCs, and heavy metals
including lead, copper, and zinc. The contaminants identified in tank samples include
PCBs, pesticides, and heavy metals including lead and zinc. Direct contact with
contaminated soils may present a health threat; however, since the site is fenced, the
potential of direct contact with soils has been reduced. Other potential health threats
include the use of contaminated groundwater or surface water by residents or workers
or inhaling site dusts.
Cleanup Approach
This site is being addressed in three stages: initial actions and two long-term remedial phases
focusing on cleanup of the groundwater and tanks, and soil.
Response Action Status
Initial Actions: During 1984, several potentially hazardous sections of the site near
the trailer park were covered with concrete to reduce potential human contact with
site wastes. In 1985, the EPA staged and sampled drums, sampled pits and the area
surrounding them, and transported the waste for disposal at an approved hazardous waste disposal
facility. Approximately 1,800 cubic yards of hazardous materials from two waste pits and
numerous surface seeps were shipped for disposal, and 25,000 gallons of liquids from an
aboveground tank were removed. Sludge from the pits was solidified, and the pits were excavated
and backfilled. In 1987, the EPA removed an additional 33,000 gallons of oil and water from an
on-site tank. The site was completely fenced in 1987.
Groundwater and Tanks: The EPA selected final remedies for cleanup of the
tanks that include removing and disposing of remaining contaminated wastes in the
tanks; solidifying tank wastes prior to off-site disposal, if necessary; and cleaning,
dismantling, and disposing of the tanks off site. The EPA removed remaining tanks in 1991. The
final cleanup remedies to address groundwater contamination include using extraction wells and
air stripping technology to remove contaminants from the groundwater, and a process known as
"greensand" to filter iron and manganese from the water. The treated groundwater will be
disposed of in the North Central Canal. Groundwater is being monitored to verify contaminant
cleanup. An alternate water supply has been provided to affected private well users northwest of
the site. Treatment of contaminated groundwater began in 1995.
April 1995 2 PURITY OIL SALES, INC.
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Soil: The EPA conducted an investigation into the nature and extent of soil
contamination at the site. The investigation included soil treatability studies which
showed that the proposed cleanup plan, which includes soil vapor extraction of
contaminants from lower layers of soil, would not adequately address lead contamination. The
EPA, therefore, issued a revised proposed plan for soil cleanup before the final remedy was
selected in 1992. The remedy consists of soil vapor extraction, capping the lead-contaminated
soil, lining the flood control channel, and constructing slurry walls at the site perimeter. Design
of these remedies began in 1993 and is expected to be completed in late 1995.
Environmental Progress
By removing hazardous materials and tanks, providing alternate water supplies to affected
residents, and fencing the site, the EPA has reduced the potential of exposure to contaminated
materials at the Purity Oil Sales site while final groundwater and soil cleanup activities are being
planned.
Site Repository
Fresno County Central Library, 2420 Mariposa Street, Fresno, CA 93721
PURITY OIL SALES, INC.
April 1995
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RALPH GRAY
TRUCKING CO.
CALIFORNIA
EPA ID# CAD981995947
Site Description
EPA REGION 9
Orange County
Westminster
Other Names:
Murdy Dairy Farm
Westminster Tract #2633
Local records show that beginning in 1936, the Ralph Gray Trucking Co. deposited highly acidic
petroleum refinery sludge in four open pits on the 23-acre site. When the area was developed for
housing in the late 1950s, two trenches approximately 20 feet wide and 20 feet deep were dug in
the backyards of the houses under construction. The residual sludge in the pits was then
excavated and reburied in the trenches, with a shallow dirt cover of 1 to 3 feet. Upon moving
into their new homes, residents complained about sulfur-like odors, respiratory irritation, and
oozing of tar-like material from the buried waste onto lawns and patios and into swimming pools.
In 1986, the California Department of Toxic Substances Control (CDTSC) initiated an
investigation of the problem and began to periodically remove seeps of the tar-like material from
residents' yards. In early 1992, at the request of CDTSC, EPA assumed lead responsibility for
the site. Removal of the buried waste required the restoration of backyard at about 30 residences,
and the temporary relocation of about 45 families for periods ranging from 30 days to 9 months.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL Listing History
Proposed Date: 07/29/91
Final Date: 10/14/92
Threats and Contaminants
The waste material in the seeps contains petroleum hydrocarbons; volatile organic
compounds (VOCs) including benzene, toluene, ethylbenzene, and xylene (BTEX);
non-volatile, polynuclear aromatic hydrocarbons (PAHs); and various sulfur
compounds including sulfuric acid. Inhaling, ingesting, or coming into direct contact
with contaminants poses a health threat, as the contaminants are located near play
areas, residences, and food preparation and eating areas.
Cleanup Approach
The site is being addressed in three stages: immediate actions and two long-term phases focusing
on the cleanup of the soil and ground water.
June 1995
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Response Action Status
Immediate Actions: Removal of contaminated soil and buried hazardous waste
began in August 1994 and is expected be completed in early 1996. Some areas have
been covered with vapor barriers and clean soil. A soil vapor monitoring system is
also being installed to monitor the site for any residual contamination problems.
Soil: An investigation is underway to determine if a long-term remedy to address
contaminated soil is necessary, and to identify any soil contamination that remains at
the location of the original disposal pits. The investigation is expected to be completed
in late 1995.
Groundwater: An investigation into the nature and extent of groundwater
contamination began in the summer of 1993 and is expected to be completed in late
1995. Upon completion of the investigation, remedies for groundwater cleanup will
be selected.
Site Facts: The site is located in a culturally diverse neighborhood; 12 different languages are
spoken in 75-home subdivision. Most site fact sheets and many other site documents are available
in both English and Vietnamese. Community outreach has been conducted in Vietnamese,
Cantonese, Portuguese, and Spanish, as well as English. An extensive community relations
program was initiated early in the project and has been part of project, planning, and scheduling.
Community support for the project is strong. The project is being addressed under Superfund
Accelerated Cleanup Model (SACM), allowing the design of immediate actions to be completed
within 10 months of listing the site on the NPL. Project design and contract oversight is being
provided by the U.S Bureau of Reclamation through an inter-agency agreement with EPA. The
Bureau of Reclamation is also responsible for the temporary relocation of site residents during the
work.
Environmental Progress
Air-borne contamination and air emissions have been reduced by removing surface seeps and
exposed waste on a regular basis, and by covering some areas with vapor barriers and clean soil.
These actions have made the site safer while long-term cleanup activities are being planned.
Site Repository
Westminister Public Library
Westminister Civic Center
Westminister, CA
June 1995 2 RALPH GRAY TRUCKING CO.
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RAYTHEON
CORP.
CALIFORNIA
EPA ID# CAD009205097
EPA REGION 9
Santa Clara County
Mountain View
Other Names:
Raytheon Semi Conductor Division
Site Description
The Raytheon Corp. operates as a semiconductor products manufacturer on this 30-acre site. The
Intel Corp. (Mountain View Plant) site, the Fairchild Semiconductor Corp. (Mountain View
Plant) site, and this site are being cleaned up simultaneously. All three sites are located in the
Middlefield-Ellis-Whisman (MEW) study area. Various industrial activities conducted in the area
of the site include semiconductor manufacturing, metal finishing operations, parts cleaning,
aircraft maintenance, and other activities requiring the use, storage, and handling of a variety of
chemicals, particularly solvents. Site investigations at several of these facilities during 1981 and
1982 revealed significant contamination from toxic chemicals, primarily volatile organic
compounds (VOCs), in soil and groundwater. The primary causes of the contamination were
leaking storage tanks and lines and poor facility management practices. Most of the site runoff is
intercepted by a storm drain system and is discharged to an off-site creek. This site is one of 28
NPL sites in the South Bay Area of San Francisco that contaminate a common groundwater
basin. Approximately 270,000 people within 3 miles of the site depend on groundwater as a
source of drinking water.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Groundwater beneath the site and on-site soils are primarily contaminated with VOCs.
Potential health threats to people include drinking contaminated groundwater,
accidentally ingesting contaminated soils, and coming into direct contact with
contaminated groundwater and soils.
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
April 1995
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Response Action Status
Initial Actions: Initial cleanup activities currently being conducted at the site by the
potentially responsible parties include tank removals, well sealing, soil removal and
treatment, slurry wall construction around contaminated soil areas, and local
groundwater treatment.
Entire Site: The final cleanup technology chosen to address groundwater
contamination is extraction and treatment. Extracted groundwater will be treated by
air stripping towers. Emission controls using granular activated carbon may be
required. The treated groundwater will be reused; water that cannot be reused will be discharged
to local streams. This cleanup phase also includes identifying and sealing any potential conduit
wells. Inward and upward hydraulic gradients will be maintained by pumping and treating water
inside the slurry walls. The aquifers within and adjacent to the slurry walls will be monitored
regularly. The selected cleanup technologies to address soil contamination include in-place vapor
extraction, with treatment by vapor phase granular activated carbon, and excavation with air
treatment. Most of the vapor extraction will take place within the slurry walls that contain the
bulk of the soil contamination. Several smaller areas outside of the slurry walls also will be
cleaned by in-place vapor extraction. Under EPA oversight, Raytheon began preparing the
technical specifications and design for the selected groundwater and soil cleanup remedies hi
1991. Groundwater and soil cleanup activities are scheduled to begin once the design phase is
completed, with soil and source control (local) groundwater treatment scheduled to begin in late
1995, and regional groundwater cleanup scheduled to begin in mid-1996. Raytheon is
responsible for groundwater treatment on regional basis and is using soil vapor extraction on their
property as a source control remedy.
Site Facts: In 1985, the EPA issued an Administrative Order on Consent to several potentially
responsible parties, including Raytheon Corporation. The Order required the parties to conduct
an investigation into the nature and extent of site contamination and to recommend alternatives
for final site cleanup.
Environmental Progress
The removal of tanks and soil, the sealing of contaminated wells, and the construction of slurry
walls have reduced the potential of exposure to contaminated materials at the Raytheon Corp. site
while the design of final cleanup remedies is taking place.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995
RAYTHEON CORP.
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RIVERBANK
AMMUNITIO
CALIFORNIA
EPA ID# CA7210020759
EPA REGION 9
Stanislaus County
10 miles northeast of Modesto
Other Names:
Nl Industries Inc. Riverbank Pit
Site Description
The 173-acre Riverbank Army Ammunition Plant site has been used to manufacture materials,
including cartridge cases, grenades, and projectiles, since 1951. The site comprises the 145-acre
main facility and four unlined industrial waste treatment ponds hi the flood plain of the Stanislaus
River, located approximately 11/2 miles north of the main facility. In 1942, the Aluminum
Company of America built the site plant as an aluminum reduction facility to supply the military.
The plant closed in 1944 and reopened in 1951, with Norris Industries, Inc. as the operating
contractor. As a result of industrial activities, the site has generated corrosive wastes, solvents,
and wastewater containing heavy metals. Reportedly, significant levels of contaminants, including
chromium and cyanide, have migrated into groundwater close to or beyond the installation
boundary. In addition, a variety of waste and debris were burned or disposed of on the ground
surface and in trenches in a landfill area at the facility. Studies also have determined that
sediments in the waste treatment ponds contain elevated levels of zinc. Overflows from the ponds
have dumped into the Stanislaus River, and the river has occasionally overflowed into the ponds
during periods of flooding. Approximately 13,700 people obtain drinking water from public and
private wells within 3 miles of the site, and at least 3,500 acres of nut and fruit orchards are
irrigated partially by groundwater. The Stanislaus River is used for irrigation and recreational
activities.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/21/90
April 1 995
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Threats and Contaminants
Groundwater is contaminated with chromium and cyanide. Soils in the landfill are
contaminated with chromium and arsenic. Sediments in the industrial waste treatment
ponds contain zinc and petroleum. Potential human health threats include drinking
contaminated groundwater and showering or bathing with the water, and accidentally
coming into contact with or ingesting contaminated soils from the landfill or sediments
from the ponds. Potential ecological threats include exposure of local species that live
in the air or on the land to contaminated soils from the landfill and sediments from the
ponds.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: When chromium was found in off-site domestic water wells in
1989, the Army supplied affected residents with bottled water. The Army
subsequently closed the contaminated wells and replaced them with new deeper, clean
wells. The Army completed an interim groundwater treatment system that became fully
operational in October 1991. This system treats chromium and cyanide contaminants from
extracted groundwater. In 1991, the Army began work to extend the existing City of
Riverbank's public water supply system to all residents who have been, or could potentially be,
affected by the contaminated groundwater. By December 1992, the residents were connected to
the Riverbank water system. In 1993, the Army removed petroleum and zinc-contaminated
sediments from its industrial waste treatment ponds and disposed of the sediments off-site.
Groundwater around the ponds is monitored quarterly as a requirement in the National Pollution
Discharge Elimination System (NPDES) permit for the ponds.
Entire Site: A remedy was selected in the spring of 1994 that includes a
comprehensive groundwater extraction and treatment system for the contaminated
groundwater; stabilization, capping, and monitoring of the landfill; and no further
cleanup action for the ponds, which were cleaned up through the immediate actions described
above. Preservation of the ponds as an ecological habitat for the local species is under
consideration. The Army completed its design of the landfill cap in late 1994. Design of the
groundwater extraction and treatment system is expected to be completed in the fall of 1995.
April 1995 2 RIVERBANK ARMY AMMUNITION PLANT
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Site Facts: The Riverbank Army Ammunition Plant is participating in the Installation
Restoration Program, a specially funded program established by the Department of Defense
(DOD) in 1978 to identify, investigate, and clean up petroleum and hazardous contaminants at
DOD facilities. In April 1990, the Army, the EPA, and the State of California signed a Federal
Facility Agreement, which established a procedural framework and schedule for the Army to
carry out the necessary site cleanup actions.
Environmental Progress
Supplying residences with clean water, replacing contaminated wells, treating and monitoring the
groundwater, and disposing of contaminated sediments have reduced the potential for exposure
while final cleanup activities are being planned at the Riverbank Army Ammunition Plant site.
Site Repository
Stanislaus County Library, Riverbank Branch, 3442 Santa Fe Street, Riverbank, CA 95367
RIVERBANK ARMY AMMUNITION PLANT
April 1995
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SACRAMEN
ARMY DEPO
CALIFORNIA
EPA ID# CA0210020780
EPA REGION 9
Sacramento County
Sacramento
Site Description
The 485-acre Sacramento Army Depot site, established in 1945, is a supply depot primarily
responsible for the receipt, storage, issuance, maintenance, and disposal of electronics supplies.
Wastes from metal-plating operations, spray booth operations, and degreasing operations were
discharged to unlined sewage lagoons, burned, or buried on site. These practices have resulted in
the contamination of some on-site soils at the Former Oxidation Lagoons and Burn Pits and other
areas, as well as the groundwater beneath the site. Soil contamination also was shown in drainage
ditches leading to the Old Morrison Creek. Approximately 50,000 people live within 3 miles of
the site. Morrison Creek flows around the southern boundaries of Sacramento Army Depot. The
groundwater contamination at the site is in the shallow and intermediate water-bearing zones, and
has migrated off site.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Groundwater is contaminated with various volatile organic compounds (VOCs). Soils
at the Former Oxidation Lagoons contain heavy metals including lead, cadmium, and
chromium. Surface soils from on-site drainage ditches are contaminated with heavy
metals including cadmium. Potential health threats to people include drinking, eating,
breathing, or coming into direct contact with contaminated soils or groundwater.
May 1995
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Cleanup Approach
This site is being addressed in five long-term remedial phases focusing on cleanup of the entire
site, groundwater, Tank 2, the oxidation lagoons, and the burn pits.
Response Action Status
Entire Site: The Army currently is investigating the nature and extent of
contamination associated with the site. The investigations will identify the
contaminants and recommend alternatives for final cleanup. Investigations focus on
identifying all areas of soil contamination, especially those that are affecting groundwater. The
Army also plans to close the old oxidation lagoons and burn pits and remove any leaking storage
tanks.
Groundwater: In 1990, the Army began operating a groundwater treatment facility.
Seven groundwater extraction wells pump the water to the treatment plant where
hydrogen peroxide is added; the water then passes through a bank of ultraviolet lights
to be decontaminated and is discharged into a sanitary sewer. The plant currently treats 1/2
million gallons of contaminated groundwater per day. Treatment of the on-site groundwater is
expected to continue until the fall of 1995. Once the remedy is amended to include cleanup of
off-site groundwater, treatment is expected to continue to the year 2001.
Tank 2: A study of the contamination around Tank 2 was completed in 1991. The
final cleanup remedy, selected in late 1991, called for soil vapor extraction to remove
the VOCs from the soil. All cleanup activities were completed in the summer of 1994.
Oxidation Lagoons: In 1988, the Army began a study of the nature and extent of
contamination related to the oxidation lagoons. The final cleanup remedy, selected in
the fall of 1992, calls for soil washing treatment to remove heavy metal
contamination. Design of the cleanup remedy is expected to be completed in the fall of 1995.
Burn Pits: In 1991, the Army began a study of the contamination in and around the
burn pits. A remedy was selected in 1993 that divides the cleanup into two phases.
The first phase uses soil vapor extraction to remove VOCs from the soil. After this
cleanup action is completed, the Army will remove heavy metals from the soil through
solidification. Design of the first phase of cleanup is complete, with cleanup activities expected to
be completed in early 1996. The second phase of cleanup, the solidification of soil contaminated
with heavy metals, is expected to begin shortly thereafter.
Site Facts: The Sacramento Army Depot is participating in the Installation Restoration
Program, a specially funded program established by the Department of Defense (DOD) in 1978
to identify, investigate, and control the migration of hazardous contaminants at military and other
DOD facilities.
May 1995 2 SACRAMENTO ARMY DEPOT
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Environmental Progress
The Army has cleaned up the soil surrounding Tank 2. The operation of the groundwater
treatment facility will continue to protect area residents from exposure to contaminated
groundwater at the Sacramento Army Depot site while final cleanup activities are being planned.
Site Repository
Sacramento Army Depot, Visitor Control Building, 8350 Fruitridge Road, Sacramento, CA
95813
SACRAMENTO ARMY DEPOT
May 1995
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SAN FERNANDO
VALLEY
(AREA 1)
CALIFORNIA
EPA ID# CAD980894893
Site Description
EPA REGION 9
Los Angeles County
North Hollywood
Other Names:
San Fernando Valley North Hollywood
Wellfield
North Hollywood Operable Unit
Burbank Operable Unit
San Fernando Valley (Area 1) is an area of contaminated groundwater covering approximately
9,336 acres near the North Hollywood section of the City of Los Angeles and the City of
Burbank. This area is part of the San Fernando Valley Basin, a natural underground reservoir.
Groundwater contaminated with volatile organic compounds (VOCs) was discovered in 1980.
Some groundwater contaminants currently affecting the Basin's water supply can be traced back
to a period between the 1940s and the 1960s, when the disposal of large quantities of chemical
wastes went unregulated throughout the Valley. The discharging of chemicals still may be
happening today. After 1980, contaminated wells either were taken out of service or were
blended with water from clean sources. Contaminated groundwater is difficult to replace in this
area because alternate sources of drinking water from the metropolitan water district and the City
of Los Angeles may not always be available due to periodic drought conditions. Results of a
groundwater monitoring program conducted from 1981 through 1987 revealed that approximately
50 percent of the water supply wells in the eastern portion of the San Fernando Valley
Groundwater Basin were contaminated. Many of the wells have been shut down. Approximately
3 million people reside within 3 miles of the site. More than 60 public drinking water supply
wells are located within the Area 1 site perimeter; 56 are owned and operated by the Los Angeles
Department of Water and Power, and 11 are owned by the Burbank Public Service Department.
The Basin provides drinking water to the communities of Los Angeles, Burbank, Glendale, and
La Crescenta, serving approximately 600,000 residents.
Site Responsibility:
This site is being addressed through
Federal, State, municipal, and
potentially responsible parties' actions.
IMPL LISTING HISTORY
Proposed date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
The groundwater is contaminated with VOCs. Exposure to VOC contamination can
occur through drinking, bathing, or cooking with contaminated groundwater.
However, local residents have been provided with imported drinking water or
groundwater mixed with imported water since before the site was listed on the NPL,
thereby reducing the threat of exposure.
May 1995
-------
Cleanup Approach
This site is being addressed in three long-term remedial phases focusing on cleanup of area-wide
ground water, the North Hollywood Area, and the Burbank Area.
Response Action Status
Area-wide Groundwater: The California Regional Water Quality Control Board is
conducting an investigation into the area-wide sources of groundwater contamination
in the San Fernando Valley Groundwater Basin. This study will include the three
other sites in the Valley that are listed on the NPL. The EPA selected an interim remedy in June
1993 that calls for groundwater extraction and treatment. The EPA plans to complete a Basin-
wide feasibility study in early 1996.
North Hollywood Area: Based on the results of the study conducted by the State,
the EPA has chosen the following interim cleanup remedy: groundwater pump and
treat using aeration and granular activated carbon air filtering units, with discharge of
treated water to the Department of Water and Power's pumping station for chlorination and
distribution as a public water supply. Construction of the treatment plant at the site began in
1987. The system was activated in 1989; the pump and treat system will continue to operate for
at least 10 years. Water is pumped to an aeration tower where the contaminants are removed
from the water by an air stripper. These contaminants are then captured by a carbon adsorption
system to limit air emissions of the compounds. The spent carbon will be removed and scheduled
either for disposal or regeneration. Treated water is transferred to a holding reservoir before
entering the city's distribution system. Approximately 50 percent of the production wells are still
being pumped, with the other 50 percent of the wells shut down due to contamination.
Burbank Area: In 1989, an interim cleanup remedy was selected for the Burbank
area of the site that calls for extraction of groundwater from new extraction wells in
the most highly contaminated zones. The contaminated water will be treated through a
stripping process (air or steam) to remove the organic solvents. Carbon adsorption will be used to
treat air emissions from the air stripping process. Once the treated water is blended, it will be
delivered to the City of Burbank's Public Service Department for distribution through the public
water supply system. Excess water will be reinjected into the aquifer. The design for Phase I of
the remedy, which will extract and treat groundwater at an approximate rate of 8 million gallons
a day, began in 1994. Construction of Phase I was completed in 1995, and the system currently
is operational. Phase II currently is being designed, and the design for Phase III is expected to
begin in late 1996.
Site Facts: The EPA and the California Regional Water Quality Control Board entered into a
Cooperative Agreement for the Basin-wide investigation of the San Fernando Valley Basin. The
potentially responsible parties will continue to conduct site cleanup under EPA oversight. The
North Hollywood Area and the Burbank Area treatment facilities combined will treat
contaminated water at a rate of approximately 15 million gallons a day.
May 1995 2 SAN FERNANDO VALLEY (AREA 1)
-------
Environmental Progress
The provision of an alternate water supply and the operation of the groundwater treatment system
in the North Hollywood and Burbank Areas have reduced the potential of exposure to
contaminated drinking water at the San Fernando Valley (Area 1) site and will continue to protect
residents near this site while further cleanup activities are being planned.
Site Repository
Burbank Public Library, Central Library, 110 North Glen Oaks Boulevard, Burbank, CA 91502
SAN FERNANDO VALLEY (AREA 1)
May 1995
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SAN FERNA
VALLEY
(AREA 2)
CALIFORNIA
EPA ID# CAD980894901
Site Description
EPA REGION 9
Los Angeles County
Los Angeles and Glendale
Other Names:
San Fernando Valley Basin-Crystal
Springs Area
Glendale North & South Operable Unit
San Fernando Valley (Area 2) is an area of contaminated groundwater covering approximately
6,680 acres near the Crystal Springs Well Field in the Cities of Los Angeles and Glendale. This
area is part of the San Fernando Valley Basin, a natural underground reservoir. Groundwater
contaminated with volatile organic compounds (VOCs) was discovered in 1980. Some
groundwater contaminants currently affecting the Basin's water supply can be traced back to a
period between the 1940s and 1960s, when the disposal of large quantities of chemical wastes
went unregulated throughout the Valley. The discharging of some chemicals still may be
occurring. To alleviate the groundwater contamination, wells either were taken out of service or
well water was blended with water from clean sources. Contaminated groundwater is difficult to
replace in this area, because water from the metropolitan water district, an alternate source of
drinking water, may not always be available due to periodic drought conditions. Results of a
groundwater monitoring program conducted from 1981 to 1987 revealed approximately 50
percent of the water supply wells in the eastern portion of the San Fernando Valley Groundwater
Basin were contaminated. Many of the wells have been shut down. Approximately 3 million
people reside within 3 miles of this site. Approximately 50 public drinking water supply wells are
located within the Area 2 site perimeter. The Basin provides drinking water to the communities
of Los Angeles, Burbank, Glendale, and La Crescenta, serving a population of approximately
600,000 residents.
Site Responsibility:
This site is being addressed through
Federal, State, and municipal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
The groundwater is contaminated with various VOCs. Exposure to the VOC
contamination can occur through drinking, bathing, or cooking with contaminated
groundwater. However, local residents have been provided with imported drinking
water or groundwater mixed with imported water since before the site was listed on
the NPL, thereby reducing the threat of exposure.
May 1995
-------
Cleanup Approach
This site is being addressed in four long-term remedial phases focusing on cleanup of area-wide
groundwater, the North Hollywood Area, the Burbank Area, and the Glendale North and South
Areas.
Response Action Status
Area-wide Groundwater: The California Regional Water Quality Control Board is
conducting an investigation into the area-wide groundwater contamination in the San
Fernando Valley Groundwater Basin. This investigation includes the three other sites
in the Valley that are on the NPL. The EPA selected an interim remedy in June 1993 that calls
for groundwater extraction and treatment. The EPA plans to complete the Basin-wide feasibility
study in early 1996.
North Hollywood Area: Based on the results of the study conducted by the State,
the EPA has chosen the following interim cleanup remedy: groundwater pump and
treatment using aeration and granular activated carbon air filtering units, with the
discharge of treated water to the Department of Water and Power's pumping station for
chlorination and distribution as a public water supply. Construction of the treatment plant began
in 1987. The system was activated in 1989 and will continue to operate for at least 10 years.
Water is pumped to an aeration tower where the contaminations are removed from the water by
an air stripper. These contaminants are then captured by a carbon adsorption system to limit air
emissions of the compounds. The spent carbon will be removed and scheduled either for disposal
or regeneration. Treated water is transferred to a holding reservoir before entering the city's
distribution system. Approximately 50 percent of the production wells are still being pumped,
with the other 50 percent of the wells shut down due to contamination.
Burbank Area: In 1989, an interim cleanup remedy was selected for the Burbank
area of the site that calls for extraction of groundwater from new extraction wells in
the most highly contaminated zones. The contaminated water will be treated through
a stripping process (air or steam) to remove the organic solvents. Carbon adsorption will be used
to treat air emissions from the air stripping process. Once the treated water is blended, it will be
delivered to the City of Burbank's Public Service Department for distribution through the public
water supply system. Excess water will be reinjected into the aquifer. The design of Phase I of
the remedy, which will extract and treat groundwater at an approximate rate of 8 million gallons
a day, began in 1994. Construction of Phase I was completed in 1995, and the system currently
is operational. Phase II currently is being designed, and the design for Phase III is expected to
begin in late 1996.
Glendale North and South Areas: The Los Angeles Department of Water and
Power conducted an investigation to determine the nature and extent of groundwater
contamination at the Glendale North & South areas. Investigations for both areas as
well as proposed cleanup plans were prepared in 1992. Groundwater pump and treat was selected
as the final cleanup remedy in 1993. Design of the remedy is underway and expected to be
completed in early 1996.
May 1995 2 SAN FERNANDO VALLEY (AREA 2)
-------
Site Facts: The EPA and the California Regional Water Quality Control Board have entered
into a Cooperative Agreement to perform an investigation of contamination sources in the San
Fernando Valley Basin.
Environmental Progress
The provision of an alternate drinking water supply and pumping and treating of contaminated
groundwater in the North Hollywood and Burbank Areas have reduced the potential of exposure
to contaminated drinking water at the San Fernando Valley (Area 2) site and will continue to
protect residents near this site while further cleanup activities are being planned.
Site Repository
City of Glendale Public Library, 222 East Harvard Street, Glendale, CA 91205
SAN FERNANDO VALLEY (AREA 2)
May 1995
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SAN FERNA
VALLEY
(AREA 3)
CALIFORNIA
EPA ID# CAD980894984
EPA REGION 9
Los Angeles County
Glendale
Other Names:
San Fernando Valley Basin-
Glorietta Area
La Crescenta Operable Unit
Verdugo
Site Description
The 5,200-acre San Fernando Valley (Area 3) site is an area of contaminated groundwater
located near the Glorietta Well Field in the City of Glendale. This area is part of the Verdugo
Basin, a natural underground reservoir that represents an important source of drinking water for
people in the City of Glendale and the unincorporated area of La Crescenta. The Verdugo Basin
flows into the San Fernando Valley Groundwater Basin. Groundwater contaminated with volatile
organic compounds (VOCs) was discovered in 1980. Some groundwater contaminants currently
affecting the Basin's water supply can be traced back to a period between the 1940s to the 1960s,
when the disposal of large quantities of chemical wastes went unregulated throughout the Valley.
Illegal dumping and currently leaking underground storage tanks may be the cause of further
groundwater contamination. To alleviate this groundwater contamination, wells either were taken
out of service or were blended with water from clean sources. Contaminated groundwater is
difficult to replace in this area because water from the metropolitan water district, an alternate
source of drinking water, may not always be available due to periodic drought conditions. Results
of a groundwater monitoring program conducted from 1981 to 1987 revealed approximately 50
percent of the water supply wells in the eastern portion of the San Fernando Valley Groundwater
Basin were contaminated. Approximately 3 million people reside within 3 miles of the site. Many
of the wells have been shut down. The Basin provides drinking water to the communities of Los
Angeles, Burbank, Glendale, and La Crescenta and serves approximately 600,000 residents.
Site Responsibility:
This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10786
Threats and Contaminants
The groundwater is only minimally contaminated with various VOCs. Exposure to the
VOC contamination can occur through drinking, bathing, and cooking with
contaminated groundwater. However, local residents have been provided with
imported drinking water or groundwater mixed with imported water since before the
site was listed on the NPL, which thereby reduces the threat of exposure.
May 1995
-------
Cleanup Approach
This site is being addressed in a long-term remedial phase focusing on cleanup of the area-wide
ground water.
Response Action Status
Area-wide Groundwater: The California Regional Water Quality Control Board is
conducting an investigation into the area-wide sources of groundwater contamination
in the San Fernando Valley Groundwater Basin. This study will include the three
other sites in the Valley that are on the NPL. The EPA selected an interim remedy in June 1993
that calls for groundwater extraction and treatment. The EPA plans to complete the Basin-wide
feasibility study in early 1996.
Site Facts: The EPA and the California Regional Water Quality Control Board entered into a
Cooperative Agreement to perform an investigation of the contamination in the San Fernando
Valley Basin.
Environmental Progress
The provision of an alternate water supply has reduced the potential of exposure to contaminated
drinking water at the San Fernando Valley (Area 3) site and will continue to protect residents
near this site while final cleanup activities are being planned.
Site Repository
Burbank Public Library, Central Library, 110 North Glen Oaks Boulevard, Burbank, CA 91502
May 1995
SAN FERNANDO VALLEY (AREA 3)
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SAN FERNANDO
VALLEY
(AREA 4)
CALIFORNIA
EPA ID# CAD980894976
EPA REGION 9
Los Angeles County
Los Angeles
Site Description
The 5,860-acre San Fernando Valley (Area 4) site is an area of contaminated groundwater
located near the Pollock Well Field in the City of Los Angeles. This area is part of the San
Fernando Valley Basin, a natural underground reservoir. Groundwater contaminated with volatile
organic compounds (VOCs) was discovered in 1980. Some groundwater contaminants currently
affecting the Basin's water supply can be traced back to a period between the 1940s and the
1960s, when the disposal of large quantities of chemical wastes went unregulated throughout the
Valley. To alleviate this groundwater contamination, wells either were taken out of service or
blended with water from clean sources. Contaminated groundwater is difficult to replace in this
area because alternate sources of drinking water from the metropolitan water district and the City
of Los Angeles may not always be available due to periodic drought conditions. Results of a
groundwater monitoring program conducted from 1981 to 1987 revealed approximately 50
percent of the water supply wells in the eastern portion of the San Fernando Valley Groundwater
Basin were contaminated. Many of the wells have been shut down. Approximately 3 million
people reside within 3 miles of the groundwater basin. The Basin provides drinking water for the
communities of Los Angeles, Burbank, Glendale, and La Crescenta and serves approximately
600,000 residents.
Site Responsibility:
This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
The groundwater is contaminated with various VOCs. Exposure to VOC
contamination can occur through drinking, bathing, or cooking with contaminated
groundwater. However, local residents have been provided with imported drinking
water or groundwater mixed with imported water since before the site was listed on
the NPL, which thereby reduces the threat of exposure.
May 1995
-------
Cleanup Approach
This site is being addressed in two long-term remedial phases focusing on cleanup of the area-
wide groundwater and Pollock Well Field.
Response Action Status
Area-wide Groundwater: The California Regional Water Quality Control Board is
conducting an investigation into the area-wide sources of groundwater contamination
in the San Fernando Valley Groundwater Basin. This investigation will include the
three other sites in the Valley that are on the NPL. The EPA selected an interim remedy in June
1993 that calls for groundwater extraction and treatment. The EPA plans to complete the Basin-
wide feasibility study in early 1996.
Pollock Well Field: EPA completed an interim investigation of Pollock Well Field
in April 1994. The Los Angeles Department of Water and Power, under EPA
oversight, is expecting to reactivate the Pollock Well Field and begin wellhead
treatment in 1997. Investigations are continuing to determine the full nature and extent of
contamination at this area. These investigations are expected to be completed in 1996, at which
time final cleanup remedies will be selected.
Site Facts: The EPA and the California Regional Water Quality Control Board entered into a
Cooperative Agreement to perform an investigation of the contamination in the San Fernando
Valley Groundwater Basin.
Environmental Progress
The provision of an alternate water supply has reduced the potential of exposure to contaminated
drinking water at the San Fernando Valley (Area 4) site and will continue to protect residents
while investigations continue.
Site Repository
City of Glendale Public Library, 222 East Harvard Street, Glendale, CA 91205
Los Angeles Department of Water and Power Library, 111 North Hope Street, Room 518,
Los Angeles, CA 90012
May 1995 2 SAN FERNANDO VALLEY (AREA 4)
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SAN GABRIEL
(AREA 1)
CALIFORNIA
EPA ID# CAD980677355
Site Description
The San Gabriel Valley (Area 1) site is an area of contaminated groundwater over 4 miles long
and IVfc miles wide located in the San Gabriel Valley. In 1984, the EPA identified four large
areas of groundwater contamination in the San Gabriel Valley; each area is a separate Superfund
site. The sites include four large areas of groundwater contamination that underlie significant
portions of the Cities of Alhambra, Arcadia, Azusa, Baldwin Park, Industry, El Monte, La
Puente, Monrovia, Rosemead, South El Monte, West Covina, and other areas of the 170 square-
mile San Gabriel Valley. Over 30 square miles of groundwater under the Valley may be
contaminated. Contamination of the groundwater by volatile organic compounds (VOCs) was first
detected in 1979 when Aerojet Electrosystems in Azusa sampled nearby wells in the Valley
County Water District. Subsequently, the California Department of Health Services (CDHS)
initiated a well sampling program to assess the extent of contamination. By 1984, 59 wells were
found to be contaminated with high levels of VOCs. Hundreds of individual facilities could be
contributing to the contamination in the basin through improper handling and disposal practices.
The area of contamination parallels the San Gabriel River to the east. The basin's groundwater
provides approximately 90 percent of the domestic water supply for over 1,000,000 people who
live in the Valley. Over 400 water supply wells are used in the basin to extract groundwater for
industrial, business, agricultural, and domestic uses. Forty-five different water suppliers operate
in the basin and provide drinking water to more than 1,000,000 people. In 1992, EPA
completed construction of a water treatment plant for the Richwood Mutual Water Company to
assist them in providing water that meets drinking water standards.
«. » •,-•,• ^u• • • u • AA A ^ u NPL LISTING HISTORY
Site Responsibility: This site is being addressed through
Federal and State actions.
Proposed Date: 09/08/83
Final Date: 05/08/84
May 1995
-------
Threats and Contaminants
Groundwater and soil are contaminated with various VOCs. People in the San Gabriel
Valley may be exposed to contaminants in ground water and soil through drinking,
bathing, or cooking. People who inhale vapors that contain VOCs could be exposed to
hazardous substances. Currently, all drinking water provided meets Federal and State
drinking water standards.
Cleanup Approach
This site is being addressed in five long-term remedial phases focusing on cleanup of area-wide
contamination, the Whittier Narrows area, the Suburban Water System's Bartolo Well Fields, the
Richwood Mutual Water Company area, and identification and cleanup of the source of
contamination.
Response Action Status
Area-wide Contamination: In 1984, the EPA began a study into the nature and
extent of contamination throughout the four San Gabriel Valley sites. The intent of the
investigation is to identify areas of the site for focused study and provide support to
ongoing cleanup efforts. This study is expected to continue through late 1996.
Whittier Narrows Area: In 1987, the EPA began a study of the nature and extent
of contamination in the Whittier-Narrows area of the San Gabriel Valley. The
investigation led to a decision in 1993 that no further action was required in this area
except groundwater monitoring, because contaminant levels were within health-based levels.
Suburban Water System's Bartolo Well Field: In 1988, the EPA selected the
following alternatives to address contamination at the Bartolo Well Field: extracting
groundwater from the existing wells in the Bartolo Well Field; modifying, if feasible,
the existing wells and installing new production wells to selectively extract groundwater from the
most highly contaminated zones of the underlying aquifer; building an air stripping system;
taking measures to floodproof the wells; installing a gas treatment system to control the emissions
of VOCs from the air stripping system; treating contaminated water to concentrations that meet
the requirements of the State and the EPA; and feeding the treated water directly into Suburban
Water System's water distribution system. Design of the cleanup activities was completed in
1991. However, groundwater contamination levels at the Bartolo Well Field and throughout the
area adjacent to and upgradient from the wells dropped and now meet federal drinking water
standards. Therefore, the remedy was amended in the fall of 1993 to include monitoring only,
with a contingency plan to treat groundwater should contaminant levels again exceed federal
drinking water standards.
Richwood Mutual Water Company: In 1992, the EPA installed a water treatment
system to provide clean water to the Richwood Mutual Water Company. In 1993,
responsibility for operating the plant was transferred from the EPA to the California
State Department of Toxic Substances.
May 1995 2 SAN GABRIEL VALLEY (AREA 1)
-------
Source Identification and Control: The California Regional Water Quality
Control Board, Los Angeles Region, working under a Cooperative Agreement with
the EPA, is identifying the sources of contamination. To date, nearly 400 individual
facilities have been confirmed as having soil contamination.
Environmental Progress
Completed actions to ensure that residents are being provided with a safe drinking water supply
have addressed immediate site contamination concerns. The EPA performed preliminary
investigations and determined that residents near the San Gabriel Valley (Area 1) site are
protected while studies are taking place and final cleanup actions are being planned.
Site Repository
Whittier Central Library, 7344 South Washington Street, Whittier, CA 90602
SAN GABRIEL VALLEY (AREA 1)
May 1995
-------
SAN GABRIEL
(AREA 2)
CALIFORNIA
EPA ID#CAD980818512
EPA REGION 9
Los Angeles County
Baldwin Park
Site Description
The San Gabriel Valley site is an area of contaminated groundwater that runs along the west fork
of Alhambra Creek in the San Gabriel Valley. This site is located in the 170-square-mile San
Gabriel Valley. Over 30 square miles of groundwater under the Valley may be contaminated. The
site includes large areas of groundwater contamination that underlie significant portions of the
Cities of Alhambra, Arcadia, Azusa, Baldwin Park, Industry, El Monte, La Puente, Monrovia,
Rosemead, South El Monte, West Covina, and other areas of the San Gabriel Valley.
Contamination of the groundwater by volatile organic compounds (VOCs) was first detected in
1979 when Aerojet Electrosystems in Azusa sampled nearby wells in the Valley County Water
District. Following this discovery, the California Department of Health Services (CDHS) initiated
a well sampling program to assess the extent of contamination. By 1984, 59 wells were found to
be contaminated with high levels of various VOCs. Hundreds of individual facilities could be
contributing to the contamination in the basin through improper handling and disposal practices.
Analyses show that many wells in the area do not meet the EPA's standards for water quality.
The basin's groundwater provides approximately 90 percent of the domestic water supply for
over 1,000,000 people who live in the Valley. Over 400 water supply wells are used in the basin
to extract groundwater for industrial, business, agricultural, and domestic uses. Forty-five
different suppliers of water operate in the basin and provide drinking water to more than
1,000,000 people.
Site Responsibility:
This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 05/08/84
May 1995
-------
Threats and Contaminants
The San Gabriel Valley (Area 2) site includes multiple plumes of groundwater
contamination. The area of contamination is several miles long, thousands of feet
wide, and several hundred feet deep. The most prevalent contaminants in the
groundwater are trichloroethene (TCE), perchloroethylene (PCE), and carbon
tetrachloride. Other volatile organic compounds (VOCs) are also present. The peak
contaminant concentration measured in groundwater is 7500 times the maximum
contaminant level (MCL) allowed by Federal and State law. People could face a health
threat by ingesting or touching contaminated soil or water.
Cleanup Approach
This site is being addressed in three long-term remedial phases focusing on cleanup of area-wide
contamination, the Baldwin Park area, and identification and control of the source of
contamination.
Response Action Status
Area-wide Contamination: In 1984, the EPA began efforts to understand the
nature and extent of the soil and groundwater contamination, develop a basin-wide
cleanup plan to set cleanup priorities, and develop the institutional framework
necessary to address the contamination. The EPA expects to continue these efforts through late
1996.
Baldwin Park: The EPA has compiled and analyzed sampling results from existing
water supply wells, sampled inactive water supply wells, worked with businesses to
install and sample more than 25 groundwater monitoring wells, installed one
1,500-foot monitoring well, and established a basin-wide groundwater database now shared by
numerous agencies'. EPA completed an investigation and issued its proposed plan for cleanup in
1993. A remedy was selected in March 1994. The selected remedy, now in the design stage,
calls for large groundwater pump and treat systems capable of extracting approximately 19,000
gallons per minute, or 27 million gallons per day, of contaminated groundwater.
Source Identification and Control: The California Regional Water Quality
Control Board, Los Angeles Region, working under a Cooperative Agreement with
the EPA, is identifying the sources of contamination. To date, nearly 400 individual
facilities have been confirmed as having soil contamination.
May 1995 2 SAN GABRIEL VALLEY (AREA 2)
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Site Facts: The Baldwin Park remedy attempts to combine cleanup and regional water supply
goals. EPA is working with local agencies to reach agreements to implement a joint clean
up/water supply project that would satisfy EPA cleanup goals and regional water supply goals by
transporting treated groundwater to displace imported surface water from the Colorado River and
Northern California. A joint project would cost more than a "cleanup only" project, but has the
potential to use revenue from sales of treated groundwater and Federal and local subsidies to
offset the increased costs. Efforts are underway to resolve the many institutional obstacles to a
joint clean up/water supply project, including the need for modifications to the existing water
rights agreement, agreements to fund the water supply components of remedy, and agreements
for use of existing water distribution infrastructure. An agreement is in place for the potentially
responsible parties to begin the design of the Baldwin Park remedy. Special Notice indicating
responsibility for the remainder of the design and for cleanup actions is expected in 1995. In the
1980s, EPA and the California Regional Water Quality Control Board began efforts to identify
the sources of the groundwater contamination in San Gabriel Valley (Area 2) with a list of more
than 1,600 commercial and industrial facilities. Through searches of State and local records,
information requests to hundreds of businesses, facility inspections, soil vapor and groundwater
sampling, and other investigative techniques, the EPA and the Regional Water Quality Control
Board have narrowed the list to 17 potentially responsible parties that EPA believes are
responsible for the majority of the groundwater contamination in the area.
Environmental Progress
After adding this site to the NPL, the EPA performed preliminary investigations and determined
that no immediate actions were required at the San Gabriel Valley (Area 2) site while studies are
taking place and final cleanup actions are planned.
Site Repository
Whittier Central Library, 7344 South Washington Street, Whittier, CA 90602
SAN GABRIEL VALLEY
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SAN GABRIEL
(AREA 3)
CALIFORNIA
EPA ID#CAD980818579
EPA REGION 9
Los Angeles County
Alhambra
Site Description
The San Gabriel Valley site is an area of contaminated groundwater that runs along the west fork
of Alhambra Creek in the San Gabriel Valley. This site is located in the 170-square-mile San
Gabriel Valley. Over 30 square miles of groundwater under the Valley may be contaminated. The
site includes large areas of groundwater contamination that underlie significant portions of the
Cities of Alhambra, Arcadia, Azusa, Baldwin Park, Industry, El Monte, La Puente, Monrovia,
Rosemead, South El Monte, West Covina, and other areas of the San Gabriel Valley.
Contamination of the groundwater by volatile organic compounds (VOCs) was first detected in
1979 when Aerojet Electrosystems in Azusa sampled nearby wells in the Valley County Water
District. Following this discovery, the California Department of Health Services (CDHS) initiated
a well sampling program to assess the extent of contamination. By 1984, 59 wells were found to
be contaminated with high levels of various VOCs. Hundreds of individual facilities could be
contributing to the contamination in the basin through improper handling and disposal practices.
Analyses show that many wells in the area do not meet the EPA's standards for water quality.
The basin's groundwater provides approximately 90 percent of the domestic water supply for
over 1,000,000 people who live in the Valley. Over 400 water supply wells are used in the basin
to extract groundwater for industrial, business, agricultural, and domestic uses. Forty-five
different suppliers of water operate in the basin and provide drinking water to more than
1,000,000 people.
Site Responsibility:
This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 05/08/84
Threats and Contaminants
Groundwater and soil are contaminated with various VOCs. People in the San Gabriel
Valley may be exposed to contaminants in groundwater and soil through drinking,
bathing, or cooking. People who inhale vapors from groundwater that contain VOCs
could be exposed to hazardous substances. Currently, all drinking water provided
meets Federal and State drinking water standards.
May 1995
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Cleanup Approach
This site is being addressed in two long-term remedial phases focusing on cleanup of area-wide
contamination and identification and control of the source of contamination.
Response Action Status
Area-wide Contamination: In 1984, the EPA began a study of the nature and
extent of contamination throughout the San Gabriel Valley. The intent of this
investigation is to identify specific areas at the San Gabriel Valley site for focused
study as well as to support ongoing activities at other areas of the San Gabriel Valley sites.
Under this investigation, additional groundwater cleanup or monitoring may be required. The
EPA expects to continue these efforts through late 1996.
Source Identification and Control: The California Regional Water Quality
Control Board, Los Angeles Region, working under a Cooperative Agreement with
the EPA, is identifying sources of contaminants. To date, nearly 400 individual
facilities have been confirmed as having soil contamination.
Environmental Progress
After adding this site to the NPL, the EPA performed preliminary investigations and determined
that no immediate actions were required at the San Gabriel Valley (Area 3) site while studies are
taking place and final cleanup actions are planned.
Site Repository
Whittier Central Library, 7344 South Washington Street, Whittier, CA 90602
May 1995
SAN GABRIEL VALLEY (AREA 3)
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SAN GABRIEL flmttEY EPA REGION 9
\ rS Los Angeles County
(AREA 4) -} °^ LaPuente
CALIFORNIA
EPA ID#CAD980817985
Site Description
The San Gabriel Valley (Area 4) site is an area of contaminated groundwater that runs along San
Jose Creek in La Puente. This site is one of four Superfund sites located in the 170-square-mile
San Gabriel Valley. Over 30 square miles of groundwater under the Valley may be contaminated.
The sites include four large areas of groundwater contamination that underlie significant portions
of the Cities of Alhambra, Arcadia, Azusa, Baldwin Park, Industry, El Monte, La Puente,
Monrovia, Rosemead, South El Monte, West Covina, and other areas of the San Gabriel Valley.
Contamination of the groundwater by volatile organic compounds (VOCs) was first detected in
1979 when Aerojet Electrosystems in Azusa sampled nearby wells in the Valley County Water
District. Following this discovery, the California Department of Health Services (CDHS) initiated
a well sampling program to assess the extent of contamination. By 1984, 59 wells were found to
be contaminated with high levels of various VOCs. Hundreds of individual facilities could be
contributing to the contamination in the basin through improper handling and disposal practices.
Analyses show that many wells in the area do not meet the EPA's standards for water quality.
The basin's groundwater provides approximately 90 percent of the domestic water supply for
over 1,000,000 people who live in the Valley. Over 400 water supply wells are used in the basin
to extract groundwater for industrial, business, agricultural, and domestic uses. Forty-five
different suppliers of water operate in the basin and provide drinking water to more than
1,000,000 people.
o-* D -U-I-* TU- v u» AA A A, t, NPL LISTING HISTORY
Site Responsibility: This site is being addressed through proposed Date: 09/08/83
Federal and State actions.
Final Date: 05/08/84
Threats and Contaminants
Groundwater and soil are contaminated with various VOCs. People in the San Gabriel
Valley may be exposed to contaminants in groundwater and soil through drinking,
bathing, or cooking. People who inhale vapors from groundwater that contain VOCs
could be exposed to hazardous substances. Currently, all drinking water provided
meets Federal and State drinking water standards.
May 1995
-------
Cleanup Approach
This site is being addressed in three long-term remedial phases focusing on cleanup of area-wide
contamination, the Puente Valley area, and identification and control of the source of
contamination.
Response Action Status
Area-wide Contamination: In 1984, the EPA began a study of the nature and
extent of contamination throughout the San Gabriel Valley. The intent of this
investigation is to identify specific areas of the site for focused study and provide
support to ongoing activities at all areas of the San Gabriel Valley site. The EPA expects to
continue these efforts through late 1996.
Puente Valley Area: Potentially responsible parties, under EPA oversight, are
investigating the nature and extent of contamination at the Puente Valley area. The
investigation is expected to be completed in late 1996.
Source Identification and Control: The California Regional Water Quality
Control Board, Los Angeles Region, working under a Cooperative Agreement with
the EPA, is identifying sources of contaminants. To date, nearly 400 individual
facilities have been confirmed as having soil contamination.
Environmental Progress
After adding this site to the NPL, the EPA performed preliminary investigations and determined
that no immediate actions were required at the San Gabriel Valley (Area 4) site while studies are
taking place and final cleanup actions are planned.
Site Repository
Whittier Central Library, 7344 South Washington Street, Whittier, CA 90602
May 1995 2 SAN GABRIEL VALLEY (AREA 4)
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SELMA TRE
CALIFORNIA
EPA ID# CAD029452141
EPA REGION 9
Fresno County
1/2 mile from Selma
Other Names:
Selma Pressure Treating Company
Saw Mill Properties
Site Description
The 18-acre Selma Treating Company site includes a 3- to 4-acre wood treatment facility and 14
acres of an adjacent vineyard that were used for site drainage. The facilities on site have been
used by a series of owners to treat lumber products almost continuously since 1936. At least two
general methods of wood preservation have been used. Before 1965, lumber was dipped into a
mixture of pentachlorophenol (PCP) and oil, and then was dried on open racks, letting the excess
liquid drip off. In 1965, the site converted to a pressure-treating process, which consisted of two
basic steps: conditioning the wood to reduce moisture content and to increase permeability, and
impregnating the wood with chemical preservatives. From 1936 to 1971, chemical wastes from
the treatment plant were disposed of on site in percolation ditches, dry wells, an unlined pond,
and a sludge pit. Chemical preservatives also were released to the ground, particularly in the
wood treatment area, as a result of spillage, dripping, and leaking. Waste fluids were discharged
through pipelines that ran along the boundaries of the vineyard into off-site drainage areas and
ditches. In 1971, the State collected samples from an unlined sump on the property. After
concluding that the discharges posed a serious threat, the State issued discharge requirements.
Subsequently, the company installed an effluent recovery system. Between 1978 and 1981, the
State issued new waste discharge requirements for the facility that included provisions for
preventing and monitoring spills and leaks from waste storage areas onto unpaved areas and for
preventing surface runoff from the unpaved areas. In 1981, the Selma Treating Company filed
for bankruptcy. In 1982, Sawmill Properties, Inc. acquired the facility with the stipulation that
Selma Leasing Company continue to accept responsibility for the site cleanup. The aquifer
beneath the site is the sole source of water in the area. There are 12 residences and businesses
within 1/4 mile of the site. The Town of Selma has a population of approximately 10,000 people.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
April 1995
-------
Threats and Contaminants
Groundwater contains chromium. Soil is contaminated with PCP, volatile organic
compounds (VOCs), and heavy metals such as chromium, arsenic, and copper. People
who accidentally ingest or come into direct contact with contaminated groundwater or
soils may be at risk. However, no contamination has been found in any public or
private drinking water wells. If contaminants reach irrigation wells, crops may
become contaminated.
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: In 1982, Sawmill Properties installed concrete drip drying pads and
runoff containment berms and instituted operational controls to prevent further soil
and groundwater contamination.
Entire Site: In 1988, the EPA selected a remedy to clean up the site by extracting
and treating the groundwater and then reinjecting the treated water into the aquifer or
discharging it off site; excavating the contaminated soil, solidifying it, placing it back
in the excavated areas, and covering it with clean soil or clay; monitoring the groundwater and
soil for 30 years; and placing restrictions on land and groundwater use. The EPA completed the
technical specifications for the soil cleanup in mid-1992. Cleanup began shortly thereafter and is
expected to be completed in late 1996. Groundwater cleanup is being undertaken in two phases.
This approach is the result of changes in the contaminated aquifer from five years of drought.
The EPA completed the design for a pilot groundwater treatment system in early 1992 and is
expected to complete construction of the pilot system in late 1995. The second phase is now
underway, with completion of the design for a full-scale treatment system expected in late 1995.
Construction of the full-scale treatment system is expected to begin in 1996.
Environmental Progress
The installation of concrete pads and berms has contained contaminated soil and groundwater at
the Selma Treating Company site while cleanup continues.
Site Repository
Fresno County Library, Selma Beach, 2200 Selma Street, Selma, CA 93662
April 1995
SELMA TREATING CO.
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SHARPE ARMY
CALIFORNIA
EPA ID# CA8210020832
Site Description
EPA REGION 9
San Joaquin County
11/2 miles east of Lathrop
The 724-acre Sharpe Army Depot site has been involved in the storage, shipping, packaging, and
maintenance of general supplies. Between 1941 and 1975, maintenance of aircraft, vehicles,
industrial equipment, and medical equipment resulted in the generation of a variety of chemical
wastes. Wastes produced on site were disposed of in multiple locations, including the South
Balloon Area, the Burning Pits Area, and the North Balloon Area. The wastes include sludge
containing phenols, polychlorinated hydrocarbons, and used paints and solvents. Wastes have
contaminated both soil and groundwater. All maintenance activities have ceased, and the waste
areas no longer are used. The Depot employs approximately 1,200 people. The contaminated sole
source aquifer supplies water to approximately 33,600 people within 3 miles of the facility. The
San Joaquin River is 2 miles from the depot.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Groundwater and soil contain volatile organic compounds (VOCs) including
trichloroethylene (TCE). People who accidentally ingest contaminated groundwater or
come in direct contact with site contaminants may be at risk.
Cleanup Approach
This site is being addressed in three stages: immediate actions and two long-term remedial phases
focusing on cleanup of the entire site and groundwater cleanup.
April 1995
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Response Action Status
Immediate Actions: The Army built an interim groundwater treatment system at
the South Balloon area. Extraction and treatment of groundwater to remove VOC
began in early 1987. A second interim groundwater treatment system became
operational in the North Balloon area in late 1990.
Entire Site: In 1989, the Army began an investigation to determine the extent of
contamination throughout the base. The remedy feasibility study was finalized in
December 1993. Currently the proposed cleanup plan is being drafted and a final
remedy is expected to be selected in the fall of 1995.
Groundwater: In 1989, the Army began an investigation to determine the nature
and extent of groundwater contamination. The groundwater remedy selected in early
1993 includes the installation of a groundwater treatment system for the Central
Area. The system is being designed and is scheduled to be operational in 1995.
Site Facts: The Sharpe Army Depot is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities.
Environmental Progress
The operation of two interim groundwater treatment systems at the Sharpe Army Depot site has
reduced the potential for exposure to contaminated groundwater while further investigations are
underway and final cleanup activities are being planned.
Site Repository
Manteca Library (Administrative File Index), 320 West Center Street, Manteca, CA 95336
April 1995
SHARPE ARMY DEPOT
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SOLA OPTIC
USA, INC.
CALIFORNIA
EPA ID#CAD981171523
EPA REGION 9
Sonoma County
Petaluma
Site Description
Sola Optical USA, Inc. has been producing optical lenses on this 35-acre site since 1978. In
1982, the California Department of Health Services (CDHS) identified acetone in an on-site well.
Subsequently, Sola reported that soil adjacent to six underground solvent storage tanks at the
facility was contaminated with volatile organic compounds (VOCs). In 1985, Sola removed the
underground storage tanks and confirmed that the shallow groundwater underneath the site was
contaminated with VOCs. In 1986 and 1987, the State found low levels of solvents in the
Petaluma #5 City Well. This well is located approximately 500 feet from the site and may be
hydraulically connected to the contaminated aquifer beneath the site. The well has been shut
down until treatment of the contaminated groundwater is completed. Affected residences have
been connected to the Petaluma Water Department distribution system, which serves
approximately 50,000 people.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/22/90
Threats and Contaminants
Groundwater contains various VOCs, including acetone. The low level of contaminant
concentrations in the soil are within federal guidelines. Scientific data shows that these
soil contaminants will not affect the groundwater. If contaminants had migrated off
site, people who accidently ingested or came in direct contact with contaminated
groundwater or soils may have been at risk.
April 1995
-------
Cleanup Approach
Response Action Status
Entire site: In 1989, Sola, under EPA oversight, began an investigation to determine
the nature and extent of contamination at the site. The investigation was completed in
1991. The selected remedy for final cleanup included continued operation of the
existing extraction well that has been in use since 1988, installation of two additional shallow
wells, conversion of two deep monitoring wells into extraction wells, and treatment by carbon
adsorption of the contaminated groundwater, which is then discharged to a creek or to the City
sewage treatment plant. All site construction activities were completed in late 1992. Groundwater
treatment will continue until established cleanup goals for the site are met.
Site Facts: In 1985, the California Regional Water Quality Control Board (CRWQCB) issued
Waste Discharge Requirements calling for Sola to conduct groundwater studies. In 1987, the
CRWQCB issued site cleanup requirements calling for Sola to determine the lateral and vertical
extent of groundwater contamination and to propose cleanup alternatives. The State of California
worked with Sola to install a groundwater pump and treat system.
Environmental Progress
Construction of all cleanup remedies are complete. Ongoing treatment of groundwater will
continue to reduce site-related contamination at the Sola Optical USA, Inc. site, until established
cleanup goals are met.
Site Repository
Petaluma Public Library, 100 Fairgrounds Drive, Petaluma CA 94952
April 1995
SOLA OPTICAL USA, INC.
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SOUTH BAY
ASBESTOS AREA
CALIFORNIA
EPA ID# CAD980894885
Site Description
EPA REGION 9
Santa Clara County
Alviso
Other Names:
Alviso Dumping Area
The 550-acre South Bay Asbestos Area site is located on the southern edge of the San Francisco
Bay. Portions of the site served as dumping areas for over 30 years. Three landfills located
within the site boundaries (the Santos Landfill, the Leslie Salt Landfill, and the Sainte Claire
Corporation Landfill) received asbestos wastes from an asbestos-cement pipe manufacturing plant,
located 4 miles south of the site, that operated from 1953 until 1982. Residents reportedly used
waste asbestos pipe to drain excess water from their properties before curbs and gutters were
installed. Several areas may have been filled with asbestos-containing soils transported in by
residents to raise the elevation of their property and to improve flood protection. As a result of
heavy rains in 1983, Coyote Creek flooded the site. The City of San Jose built a levee around the
town to pump out the floodwater. The levee material was taken from the Raisch Quarry in
southern San Jose and was later found to contain asbestos. Asbestos also was found in the
Guadalupe River levee, the ring levee, and in surface soils around the town. Approximately
1,700 people live in Alviso. Most water is provided to South Bay residents through public supply
systems that draw groundwater from the deep aquifer. The majority of private wells draw water
from the less-protected shallow aquifer. The ring levee lies within the 100-year flood plain of the
Guadalupe River and was built on portions of wetland areas adjacent to Alviso. The levee also
abuts wetland areas next to a National Wildlife Refuge.
Site Responsibility:
This site is being addressed through
Federal, municipal, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/01/86
Threats and Contaminants
m
Past studies indicated that the air was polluted with asbestos due to the disturbance of
asbestos-contaminated soils, caused primarily by heavy truck traffic. Groundwater in
the shallow aquifer contains asbestos. Site soils are contaminated with asbestos. The
wetland areas adjacent to Alviso have been threatened. The greatest health threat to
people is the inhalation of airborne asbestos fibers. Once asbestos fibers enter the
lungs, the fibers can be trapped in the body. Asbestos fibers also may be ingested
through contaminated food and water.
April 1995
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Cleanup Approach
This site is being addressed in three stages: initial actions and two long-term remedial phases
focusing on cleanup of the entire site and of the ring levee.
Response Action Status
Initial Actions: In 1983, the Santa Clara valley Water District removed asbestos
wastes from the Guadalupe River levee. From 1986 to 1987, the EPA paved a lot at
the George Mayne School and an unpaved portion of Spreckles Avenue, removed a
debris pile and stabilized a trail at the Environmental Education Center, and applied polymer
sealant to the ring levee. The levee since has been sprayed annually by the City of San Jose. In
1992 and 1993, the levee was sprayed twice a year. The asbestos contaminated ring levee was
removed in 1993.
Entire Site: The final cleanup remedies selected to address contamination of the
entire site include paving the asbestos-contaminated truck and industrial yards, wet-
sweeping Alviso streets monthly, removing asbestos debris, installing landfill covers,
implementing deed restrictions, and maintaining and monitoring the site. The design of the
cleanup technologies was completed in 1992. Four truck yards have since been paved, and
maintenance inspections and repairs take place on an annual basis. An ambient air study for
asbestos was conducted in 1994 to assess the effectiveness of these cleanup efforts. Results of the
study will be available in 1995. All construction was completed in 1993. Landfill covers meet
applicable clean soil cover requirements, and deed restrictions will be implemented during 1995
to control site property use. The City of San Jose is wet-sweeping the streets on a monthly basis.
Ring Levee: The EPA had decided to build a vegetated soil cover to address the
asbestos-contaminated ring levee. However, this remedy was revised via a Consent
Decree signed in 1990 requiring the City to remove the contaminated levee and
restore the wetlands after an alternate flood control project is devised and in place. The flood
control project, scheduled for completion by late 1995, includes Coyote Creek channel
improvements. The asbestos-contaminated ring levee was removed in 1993 and replaced with a
levee made with clean soil. The replacement of the levee and the wetlands restoration are
scheduled to take place by 1996, after the flood control project is completed.
Environmental Progress
Removing asbestos wastes, paving of the lots, and removing the asbestos-contaminated ring levee
have reduced the potential of exposure to contaminated materials at the South Bay Asbestos Area
site while flood control measures and additional site cleanup take place.
April 1995 2 SOUTH BAY ASBESTOS AREA
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Site Repository
San Jose Public Library, Alviso Branch, 1060 Taylor Street, Alviso, CA 95002
SOUTH BAY ASBESTOS AREA
April 1995
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SOUTHERN
CALIFORNIA
EDISON CO.
(VISALIA POLEYARD
CALIFORNIA
EPA ID# CAD980816466
EPA REGION 9
Tulare County
Visalia
Site Description
The 20-acre Southern California Edison Co. (Visalia Poleyard) site was operated as a utility pole
treatment yard from the 1920s until 1980. Wood preservatives, including creosote and
pentachlorophenol (PCP), were used and stored on site during site operations. Leaking tanks and
stored treated poles have contaminated groundwater and soil. Approximately 60,000 people live
within 6 miles of the site. The distance from the site to the closest residence is 1/4 mile.
California Water Service Company wells within 3 miles of the site supply drinking water to
Visalia residents. The local municipal water system includes over 35 drinking water wells within
3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 01/22/87
Final Date: 03/31/89
Threats and Contaminants
Groundwater and soil are contaminated with wood-treatment chemicals including
creosote and PCP. Potential health threats include accidental ingestion of or direct
contact with contaminated soils or groundwater.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
April 1995
-------
Response Action Status
Immediate Actions: In 1977, a slurry wall was built to slow contaminant
migration in the shallow aquifer. Southern California Edison, the potentially
responsible party, removed 2,300 cubic yards of contaminated soil and disposed of it
off site at an approved disposal facility. The facility has upgraded its on-site groundwater
treatment system to include anthracite filtration in addition to carbon filtration. The potentially
responsible party now discharges the treated groundwater directly to Mill Creek, a small tributary
two blocks from the site. This discharge is licensed by the State.
Entire Site: Southern California Edison and the State, under EPA supervision,
conducted an investigation into the nature and extent of the contamination at the site.
The investigation defined the contaminants and provided alternatives for the final
groundwater and soil cleanup. In mid-1994, the State selected a final cleanup remedy for the site
and the EPA concurred. Since the immediate actions at the site addressed the principal threats,
the final remedy includes bioremediating remaining contaminated soil, establishing access and
deed restrictions, and capping the soil, if necessary. Further testing is being conducted before the
remedy is designed.
Site Facts: In 1976, the State issued a Cleanup and Abatement Order, requiring Southern
California Edison to abate discharge of treatment fluids into the soil, to contain contaminated soil
and water on the property, to pump shallow groundwater under the site before and during
construction of an underground slurry wall around the site, to pump and lower the confined
aquifer to remove contamination, and to clean up contaminated shallow groundwater off site. In
1987, Southern California Edison and the State signed an agreement requiring the utility to
perform a study to determine the nature and extent of site contamination and to recommend
alternatives for final cleanup action.
Environmental Progress
The construction of a slurry wall, removal of contaminated soil, and treatment of contaminated
groundwater have reduced the potential of exposure to contaminants at the Southern California
Edison Co. (Visalia Poleyard) site while cleanup remedies are being planned.
Site Repository
Contact the Region 9 Superfund Community Relations Office.
April 1995
SOUTHERN CALIFORNIA EDISON CO.
(VISALIA POLEYARD)
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SPECTRA-PHY
INC.
CALIFORNIA
EPA ID# CAD009138488
EPA REGION 9
Santa Clara County
Mountain View
Site Description
The ll'/^-acre Spectra-Physics, Inc., site has been the location of a manufacturer of electronic
equipment and gas lasers since 1961. Beginning in 1981, Spectra-Physics, Inc. stored its
hazardous wastes on bermed concrete pads. Only one storage area has a cement floor without a
berm, and that area is used for storing solid wastes. A variety of cleaners, degreasers, and
lubricants are used in the manufacturing process. Wastes from manufacturing processes include
volatile organic compounds (VOCs), paints, oils, acids, and bases. In 1981, the State discovered
areas where hazardous wastes were stored that had no dikes or leachate collection systems.
Additionally, several on-site wastewater sumps are suspected of contributing VOCs to the soils
and groundwater. Contaminated groundwater from the site has moved off site to the north and
merged with the contaminated plume of another NPL site, the Teledyne Semiconductor, Inc. site,
which borders the Spectra:Physics, Inc. site. The two firms are jointly cleaning up the sites.
Approximately 189,000 people obtain drinking water from public and private wells within 3 miles
of the site. Groundwater within 1 mile of the site is used for private and municipal purposes.
More than 200 private drinking water wells were drilled into the contaminated plume; most of
these wells have been closed. Between 1982 and 1985, the users of these private wells were
connected to municipal water supplies. The closest residence is located 200 feet southwest of the
site. San Francisco Bay is 21A miles downstream of the site and is used for recreation. The tides
that influence the Bay also influence Permanente Creek, which is within 1 mile of the site.
Several species of endangered birds are found within the area of tidal influence.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/11/91
April 1995
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Threats and Contaminants
Soil contained VOCs, but has since been cleaned up. Groundwater is contaminated
with VOCs. Elevated concentrations of VOCs were detected in water samples from
Permanente Creek. Potential health threats to people include drinking, inhaling, or
coming in direct contact with contaminated groundwater and groundwater vapors, or
touching or accidentally ingesting contaminated soils. Several species of endangered
birds could be affected by contaminated surface water.
Cleanup Approach
Response Action Status
Initial Actions: In 1987, one wastewater sump was removed, and 6 feet of
surrounding soils were excavated. In 1986 and 1988, an on-site shallow groundwater
extraction well and one intermediate zone groundwater extraction well were installed.
These wells were installed to prevent the plume of contaminants from migrating off site. Twenty
additional wells were installed and have begun extracting groundwater from the off-site
contaminant plume areas. Extracted groundwater is discharged to the City of Palo Alto sanitary
sewer system. All actions were performed by Teledyne and Spectra-Physics.
Entire Site: In 1991, the EPA chose the following cleanup remedies: vapor
extraction for soil cleanup, groundwater extraction and treatment, and quarterly
monitoring of the groundwater as well as the soil. Soil cleanup has been completed.
Groundwater treatment will continue until established cleanup goals are met.
Environmental Progress
The construction of all cleanup remedies is complete. The removal of sumps and contaminated
soil and the installation of groundwater extraction wells have reduced the potential of exposure to
contaminants at the Spectra-Physics, Inc. site while groundwater treatment is being completed.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995 2 SPECTRA-PHYSICS, INC.
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STOKER CO.
CALIFORNIA
EPA ID# CAD066635442
EPA REGION 9
Imperial County
Imperial
Site Description
The Stoker Co., which is located in a sparsely populated agricultural area, has supplied and
aerially applied pesticides since 1966. Waste and rinse waters resulting from the cleanup of
equipment are sprayed onto a 20-acre land treatment unit, which consists of a dirt road and
landing strip. Studies have shown that in the 1970s close to 300 gallons of waste waters per day
were disposed of in the land treatment unit; this amount dropped to 100 gallons sometime before
1988. Empty pesticide bags and boxes were also burned on site. While the disposal of waste
waters is permitted by the California Regional Water Quality Control Board (CRWQCB), the
Stoker Co. is required to sample the soil and the groundwater beneath the site. In 1988, birds and
fish that died in a pond at a nearby residence were found to have high levels of pesticides in their
tissue. This discovery alerted local authorities to site contamination and resulted in the closing of
the pond. Shortly afterwards an on-site warehouse containing pesticide supplies burned to the
ground. The Stoker Co. responded to this incident by removing contaminated soil, an action
performed under the Resource Conservation and Recovery Act (RCRA). Although a closure plan
was submitted in 1989 to the CRWQCB, the Stoker Co. reconsidered closing the land treatment
unit and continues to spray waste waters today. A canal runs along the southern and eastern
borders of the airstrip, delivering water to a residence less than 80 feet from the site, wetlands,
and a fishery. The wetlands also border the entire length of the airstrip and provide a habitat for
four endangered or threatened species. The fishery, which raises catfish, is located within 1/4
mile of the site. Close to 130 people live within 1 mile of the site. Employees of the Stoker Co.
are exposed to contaminated soils. One family has been relocated due to site contamination. Poor
groundwater and surface water quality has forced nearby residents to drink bottled water.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 07/21/91
June 1995
-------
Threats and Contaminants
Even though the site is located in an agricultural area where pesticides are used
extensively, the levels of pesticides in air, surface water, sediment, and soil samples
greatly exceed background concentrations. In 1988, several pesticides were detected in
the canal. Pesticides also were found in on-site soil and die pond. Sediment and air
samples collected in 1989 indicated that pesticides had been released into the air and
the wetlands.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1988, after discovering contaminants in dead birds and
fish, local authorities closed the nearby pond. In response to the 1988 fire,
approximately 300 tons of contaminated soil were removed and disposed of in a
landfill regulated under the Resource Conservation and Recovery Act (RCRA).
Entire Site: In early 1993, the EPA evaluated the site to determine if any additional
immediate actions were necessary. Assessment results indicated that further actions
were not warranted at the site at that time. The EPA is currently evaluating the scope
of any additional investigations pending the site's final listing on the NPL.
Environmental Progress
Immediate actions such as closing the pond and removing contaminated soil have reduced health
and safety risks to the nearby population and environment while further investigations into
contamination at the Stoker Co. site are being planned.
Site Repository
Not established.
June 1995 2 STOKER CO.
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STRINGFELLOW
CALIFORNIA
EPA ID#CAT080012826
EPA REGION 9
Riverside County
1 mile north of Glen Avon
Site Description
From 1956 until 1972, the 17-acre Stringfellow site was operated as a hazardous waste disposal
facility. Over 34 million gallons of industrial waste, primarily from metal finishing,
electroplating, and pesticide production, were deposited in evaporation ponds. Spray evaporation
procedures were used to accelerate the reduction of pond content volume. In 1969, excessive
rainfall caused the disposal ponds to overflow and resulted in the contamination of Pyrite Creek
and Channel. In 1978, heavy rains caused the California Regional Water Quality Control Board
(CRWQCB) to authorize a controlled release of 800,000 gallons of wastewater from the site to
prevent further waste pond overflow and massive releases. An additional 500,000 gallons of
liquid wastes were removed at that time to a Federally approved facility. In 1979 and 1980,
heavy rains again threatened releases from the waste ponds. Between the years 1975 and 1980,
approximately 61/3 million gallons of liquid wastes and materials contaminated with pesticides
were removed from the site. Glen Avon has a population of approximately 7,700 people. Over
200 residences have private wells in Glen Avon. Few private wells have been found to be
contaminated, and none presently are used for drinking water. The Glen Avon area receives
drinking water by three facilities: the Jurupa Community Services District, the Mutual Water
Company of Glen Avon, and the Santa Ana River Water Company.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/23/81
Final Date: 09/01/83
Threats and Contaminants
Groundwater contains various volatile organic compounds (VOCs) and heavy metals
such as cadmium, nickel, chromium, and manganese. Soil is contaminated with
pesticides, polychlorinated biphenyls (PCBs), sulfates, and heavy metals. People who
accidentally ingest or come into direct contact with contaminated groundwater or soil
may be at risk. The original disposal area is covered by a clay cap, fenced, and
guarded by security services. No one is currently drinking water affected by the
contaminant plume.
April 1995
-------
Cleanup Approach
This site is being addressed in five stages: initial actions and four long-term remedial phases
focusing on installation of a pre-treatment plant, control of the source of contamination, cleanup
of the lower canyon, and cleanup of the community wells and source control.
Response Action Status
Initial Actions: From 1980 to 1984, three groundwater extraction wells, a
subsurface barrier structure, and an on-site surface water drainage system with gunite
channels were built. All liquid wastes on the site were removed to a Federally
approved hazardous waste disposal facility. With the exception of 1,000 cubic yards of
DDT-contaminated soil, which were taken to a Federally approved facility, contaminated soils
from the site were used to fill waste ponds. The surface was graded, covered with clean soil, and
seeded. In 1984, the State completed initial cleanup measures including fencing the site,
maintaining the existing soil cap, controlling erosion, and disposing of the leachate extracted
above and below the on-site clay barrier dam. In 1989, residences that had been receiving bottled
water from the State were connected to the Jurupa Community Services District.
Pre-Treatment Plant: In 1984, the EPA selected a remedy for interim treatment of
contaminated groundwater. The remedy featured installing a pre-treatment system
consisting of lime precipitation for removing heavy metals and removing VOCs
through granular activated carbon treatment. The treated groundwater is discharged to an
industrial sewer line, which ultimately discharges to a publicly owned treatment works system.
Additional interceptor and monitoring wells were installed to extract contaminated groundwater
downgradient of the site. The State completed installation of the pre-treatment plant in 1985. As
of June 1992, nearly 49 million gallons of groundwater had been extracted and treated.
Source Control: In 1984, the State completed an investigation to identify and
evaluate alternatives to control the source of contamination. The State determined that
continuing the pumping and treating of contaminated groundwater is sufficient to
reduce contamination at the site. The treatment system will operate until established cleanup
levels have been met.
Lower Canyon: In 1987, the EPA selected a remedy to capture and treat the
groundwater in the lower canyon area of the site by installing a groundwater barrier
system in the area and treating the extracted groundwater, installing a peripheral
channel to direct uphill surface water runoff, extending the existing gunite channels southward to
discharge surface water into Pyrite Creek, and reconstructing the Pyrite Creek Channel. The
potentially responsible parties installed the groundwater barrier system and reconstructed the
Pyrite Creek Channel. The State designed the system and completed construction of the northern
channels in 1990.
April 1995 2 STRINGFELLOW
-------
Community Wells and Source Control: In 1988, the State and the EPA
completed an investigation determining the type and extent of contamination in the
canyon and community areas. In 1990, the EPA selected a remedy that called for the
installation of a groundwater extraction system in the community to treat contaminated
groundwater that has migrated downgradient to the area, possibly followed by reinjection of the
treated water. The potentially responsible parties conducted design tests for the community wells
system, which will lead to overall design of the pump and treat system, scheduled for completion
in 1995. In addition, they selected dewatering of the on-site groundwater, a more aggressive
effort to remove water from the groundwater table, as an interim source control measure. The
potentially responsible parties also conducted field studies of soil vapor extraction in the on-site
area, and paper studies of reinjection.
Site Facts: In 1983, the Department of Justice, on behalf of the EPA, joined with the State to
file a suit against 32 potentially responsible parties. As a result of a 1988 Administrative Order
on Consent, an amendment to that Order in 1992, and a 1992 Consent Decree, the potentially
responsible parties developed the engineering designs and agreed to construct cleanup remedies
for certain aspects of the cleanup. As of January 1995, the majority of this work had been
completed.
Environmental Progress
The removal of liquid waste, connection of affected residences to an alternate water supply, and
installation of a groundwater capture and treatment system have reduced the potential for
exposure to contaminated materials at the Stringfellow site while the remaining cleanup activities
are being planned and conducted.
Site Repository
Riverside Public Library, 3581 7th Street, Riverside, CA 92509
STRINGFELLOW
April 1995
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SULPHUR BAN
MERCURY MIN
CALIFORNIA
EPA ID# CAD980893275
EPA REGION 9
Lake County
Clear Lake
Site Description
The 120-acre Sulphur Bank Mercury Mine site initially was mined for sulfur from 1865 to 1871.
Mercury ore was mined intermittently by underground methods from 1873 to 1905. The site
periodically was opened for pit mining from 1915 to 1957. The mine, once one of the largest
producers of mercury in California, has been inactive since 1957. Approximately 120 acres of
mine tailings and waste rock and an open, unlined mine pit (called the Herman Impoundment) are
located on the property. The mine tailings extend into the Oaks Arm of Clear Lake along 1,300
feet of shoreline. Approximately 193,600 cubic yards of waste remain on site. The Herman Pit,
which is filled with acidic water, covers 23 acres and is located 750 feet upgradient of the lake.
The State has found mercury in the tailings and in the biota and bottom sediments in Clear Lake.
The levels of mercury in fish from the lake led the State to issue an advisory against eating fish.
The Clear Lake Oaks Water District, which provides municipal drinking water for 4,700 people,
is recharged by Clear Lake. Approximately 70 houses are located within 3 miles of the site. A
former freshwater wetland is located 900 feet to the east of the mine. A critical habitat for three
endangered wildlife species, the Peregrine Falcon, Southern Bald Eagle, and Yellow-Billed
Cuckoo, is located less than 1/4 mile from the site.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 08/30/90
Threats and Contaminants
m
^
Sediments from Clear Lake, soil, surface water, and fish are contaminated with
mercury and arsenic. Mercury bioaccumulation in excess of the Federally
recommended limit for human consumption has been documented in Clear Lake fish;
one of the major health threats associated with the site is eating mercury contaminated
fish. In addition, people who accidentally ingest or come into direct contact with
contaminated surface water and sediments may suffer adverse health effects. Ingestion
and inhalation of contaminated soil also are primary concerns. If contaminants leach
into the nearby wetland, wildlife in or around the water may be harmed.
April 1995
-------
Cleanup Approach
This site is being addressed in four stages: emergency actions and three long-term remedial
phases focusing on cleanup of the Herman Impoundment, the waste piles, and lake sediments.
Response Action Status
Emergency Actions: The waste piles by the shoreline slope are being cutback to
reduce further erosion of mine waste into Clear Lake. Additional activities will take
place once investigations are completed.
Herman Impoundment: In 1990, the EPA began an investigation into the nature
and extent of contamination at the impoundment. Alternatives under consideration for
cleanup of the Herman Impoundment are taking no action, neutralizing the site, or
draining and plugging the pit. The EPA is expected to select a final cleanup remedy for the
impoundment in 1995.
Waste Piles: Studies concerning the nature and extent of contamination caused by
the waste piles currently are underway. Possible cleanup remedies include further
cutting back of the slope, covering and revegetating the area, or disposing of the
tailings in the Herman Impoundment if the pit is drained and plugged. The EPA completed these
studies in late 1994 and is now reviewing alternatives for final cleanup. The EPA expects to
select a final remedy in late 1995.
Lake Sediments: The EPA has started an investigation exploring the nature and
extent of contamination in the lake sediments. Cleanup remedies being considered
include dredging and treating the sediments, or covering the contaminated sediments
with sand or clay. The EPA expects the study to be completed by the end of 1997.
Environmental Progress
The EPA is currently conducting an emergency action to reduce further erosion of mine waste
into Clear Lake while studies continue and final cleanup activities are being planned.
Site Repository
Lake County Library, 1425 North High Street, Lakeport, CA 95453
Redbud Library, 4700 Golf Avenue, Clearlake, CA 95422
EPA Region 9 Superfund Community Relations Office, 75 Hawthorne St., San Francisco, CA
94105
April 1995 2 SULPHUR BANK MERCURY MINE
-------
SYNERTEK, INC.
(BUILDING 1)
CALIFORNIA
EPA ID# CAD990832735
EPA REGION 9
Santa Clara County
Santa Clara
Site Description
From 1978 to 1986, electronics were manufactured in five buildings on the 3 1/2-acre Synertek,
Inc. (Building 1) site. Building 1 is adjacent to three underground storage tanks used as a
neutralization system which leaked volatile organic compounds (VOCs) into the soil. These tanks
were removed in 1985. At that time, it was discovered that on- and off-site groundwater had
become contaminated. Subsequently, Honeywell, the property owner, installed three on- and two
off-site groundwater extraction wells, along with an air stripping tower to treat the extracted
groundwater. The extraction and treatment system has been in operation since 1987.
Approximately 300,000 people obtain drinking water from public wells within 3 miles of the site.
The nearest downgradient municipal well is located 11/2 miles north of the plume.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 10/04/89
Threats and Contaminants
Groundwater contains various VOCs. Based on the monitoring data, there are no
indications that exposure to site-related contaminants is occurring.
April 1995
-------
Cleanup Approach
Response Action Status
State.
Initial Actions: In 1987, Honeywell installed three on- and two off-site groundwater
extraction wells, along with an air stripping tower to treat the extracted groundwater.
The treated groundwater was then discharged to the storm drain, as permitted by the
Entire Site: Synertek, under State supervision, completed an investigation resulting
in the selection of remedies for final cleanup of the site. These remedies featured
continuing the operation of the groundwater extraction and air stripping system.
Instead of discharging water to the storm drain, the EPA decided to reinject treated groundwater
back into the ground. In 1991, Synertek completed constructing an injection well and coupled it
with the existing extraction and treatment system. Groundwater treatment will continue until
established cleanup goals have been met.
Environmental Progress
Construction of all remedies is complete. The groundwater treatment continues to reduce the
potential of exposure to contaminated drinking water and protect residents near the Synertek, Inc.
(Building 1) site.
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region
2101 Webster Street, Suite 500
Oakland, CA 94612
April 1995
SYNERTEK, INC. (BUILDING 1)
-------
T.H. AGRICULT
NUTRITION CO
CALIFORNIA
EPA ID# CAD009106220
EPA REGION 9
Fresno County
Fresno
Other Names:
Thompson-Haywood Chemical Company
Site Description
The 5-acre T.H. Agriculture & Nutrition Company (THAN) site operated as a pesticide-
formulating facility from 1962 until 1981. Other companies formulated pesticides on the site from
1950 to 1962. During the 1950s and 1960s, on-site landfills were used for disposal of wastes
generated from site operations, including pesticide-laden clays from cleaning equipment. Waste
has been spilled on the surface of the site and left in piles on the ground. Sampling at the site
conducted by the California Department of Health Services (CDHS) detected pesticides in soil
and groundwater. Approximately 30,000 people live within 3 miles of the site, with the closest
resident being 500 feet from the site. Approximately 35,000 people depend on groundwater as a
source of drinking water.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/01/86
Threats and Contaminants
The groundwater and soil are contaminated with pesticides. Chloroform also is
contaminating the groundwater. People who accidentally ingest or come into direct
contact with contaminated groundwater or soils may suffer adverse health effects.
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
April 1995
-------
Response Action Status
Immediate Actions: T.H. Agriculture & Nutrition Company, under State
supervision, excavated and removed 14,000 cubic yards of contaminated soil. All
affected residences have been hooked up to the public water supply system to
eliminate the use of domestic wells near the site and the threat of exposure from contaminated
water. A soil vapor extraction system is being installed to reduce the level of chloroform in the
area.
Entire Site: The potentially responsible party is sampling to characterize soil
contamination, monitor groundwater, and characterize the hydrogeology beneath the
site. Extensive on- and off-site groundwater studies have been conducted. Currently,
the results of the groundwater field study are being evaluated to identify cleanup remedies that
could be applied at the site. The study is expected to be completed and final cleanup remedies
selected in 1995.
Environmental Progress
The removal of contaminated soil has reduced the potential for exposure to contaminated
materials at the T.H. Agriculture & Nutrition Company site while studies are taking place and
cleanup activities are being planned. The threat of exposure to chemicals through direct contact,
ingestion, and inhalation of contaminated groundwater has been eliminated by extending the
public water supply system to affected residences.
Site Repository
Fresno Country Library, Sunnyside Branch, 5547 East Kings Canyon Road,
Fresno, CA 93727
April 1995
T.H. AGRICULTURE & NUTRITION COMPANY
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TELEDYNE
SEMICONDUCTO
CALIFORNIA
EPA ID# CAD009111444
Site Description
EPA REGION 9
Santa Clara County
Mountain View
Teledyne Semiconductor has operated as a semiconductor manufacturer at this 1-acre site since
1962. In 1982, Teledyne reported to the California Regional Water Quality Control Board
(CRWQCB) that soil and groundwater were contaminated with solvents from an underground
solvent storage tank. The State inspected the site and found that contaminants had migrated north
of the site and affected approximately 50 private domestic wells. Furthermore, contaminated
groundwater that migrated north from another NPL site, Spectra-Physics, Inc., merged with the
contaminated plume of the Teledyne site. The two firms are cleaning up the sites jointly. These
sites are among the 28 sites in the South Bay Area of San Francisco. Facilities at these sites have
used a variety of toxic chemicals, primarily chlorinated organic solvents, which have
contaminated a common groundwater basin. Although the sites are listed separately on the NPL,
the EPA intends to combine cleanup activities at some of the sites as part of an area-wide
approach to the contamination. The site is located in a densely populated, urban area.
Approximately 189,000 people live within a 3-mile radius of the site, all of whom depend on
groundwater as the source of drinking water. The distance from the site to the nearest residence
is 200 feet.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Soil was contaminated with volatile organic compounds (VOCs). Groundwater is
contaminated with VOCs. People could be exposed to hazardous substances from the
site by accidental ingestion of or direct contact with contaminated groundwater.
April 1995
-------
Cleanup Approach
Response Action Status
Entire Site: In 1990, the EPA selected the following cleanup remedies: excavation
and removal of contaminated soil; groundwater extraction and treatment through an
air stripper; and quarterly monitoring of the groundwater, as well as the soil. All soil
excavation is complete at the site. Groundwater treatment will continue until established cleanup
goals are met.
Environmental Progress
Construction of all cleanup remedies is complete. Contaminated soil has been removed. Ongoing
extraction and treatment of the groundwater continues to reduce the potential for exposure to
contaminants at the Teledyne Semiconductor site. Groundwater treatment will continue until
established cleanup goals are met.
Site Repository
Mountain View Public Library, 585 Franklin Street, Mountain View, CA 94041
April 1995
TELEDYNE SEMICONDUCTOR
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TRACY DEFEN
DEPOT
CALIFORNIA
EPA ID# CA4971520834
EPA REGION 9
San Joaquin County
11/2 miles southwest of Tracy
Other Names:
Defense Distribution
Region West-Tracy
Site Description
The 448-acre Tracy Defense Depot site was an Army Supply Depot from 1942 to 1963, when it
was turned over to the Defense Logistics Agency. Operations at the site include repacking leaking
chemical containers, fumigating shipping materials, maintaining vehicles, painting, storing
chemicals, preserving metal parts, operating chemical and photographic laboratories, storing and
mixing pesticides, and storing and treating liquid and solid wastes. Liquid waste treatment and
storage areas include an unpaved storage area, two unlined sewage effluent ponds, two
abandoned sewage lagoons, two lined industrial wastewater ponds, an abandoned paint
spraying/stripping rinse water pond, an abandoned trench where 150 drums of waste oil were
buried, an unlined pond for holding stormwater, an abandoned pesticide disposal trench, an
abandoned area where substantial amounts of formaldehyde were buried, and aboveground and
underground waste tanks. Hazardous materials, including solvents, radioactive materials, medical
supplies, and solid and liquid chemicals, were disposed of in three burn pits. Former solid waste
treatment and storage areas included a fill area where food items were buried, a fill area where
construction material was buried, and three impoundments where wastes containing mercury
phosphate compounds were stored. Currently, all solid hazardous waste is hauled off site to
Federally approved disposal facilities. According to tests conducted in 1985, the shallow aquifer
below the site is contaminated with volatile organic compounds (VOCs). Approximately 25,000
people live within 3 miles of the site. Water from depot's municipal well, which is within 3 miles
of the site, is blended with water from other wells and from the Delta Mendota Canal to provide
drinking water to approximately 28,600 people.
Site Responsibility:
This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 08/30/90
Threats and Contaminants
Groundwater is contaminated with VOCs, heavy metals, and petroleum/oil lubricants.
People who accidently ingest or come into direct contact with contaminated
ground water may face health risks.
April 1995
-------
Cleanup Approach
This site is being addressed in two long-term remedial phases focusing on cleanup of the
groundwater and the entire site.
Response Action Status
Groundwater: The Defence Logistics Agency has investigated groundwater
contamination in the northern area of the facility, under the direction of the State. As
part of this investigation, an interim groundwater pump and treat system was
installed. A final cleanup remedy was selected for the groundwater in the summer of 1993. It was
determined that the existing pump and treat system should be expanded to pump more water, and
thereby address contamination in the entire groundwater plume. Treatment of the groundwater
will continue until established cleanup goals are met.
Entire Site: An investigation began in 1991 to determine the nature and extent of
contamination throughout the site. Following this investigation, scheduled for
completion in 1996, final cleanup remedies will be selected.
Site Facts: Tracy Defense Depot is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities.
Environmental Progress
Pumping and treating contaminated groundwater has reduced threats at the Tracy Defense Depot
site while studies are taking place to determine if additional cleanup activities are necessary.
Site Repository
DDRW-Sharpe, Lathrope, CA
April 1995 2 TRACY DEFENSE DEPOT
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TRAVIS AIR
FORCE BASE
CALIFORNIA
EPA ID# CA5570024575
Site Description
EPA REGION 9
Solano County
3 miles east of Fairfield
Established in 1943, the 5,025-acre Travis Air Force Base serves as Military Air Command
Headquarters to the 22nd Air Force, as well as a medical center. The Air Force has identified a
number of potentially contaminated areas, including three landfills used from 1943 to 1977, one
of which (Landfill No. 3) was used for the disposal of crushed and rinsed pesticide containers;
areas where combustible wastes were burned for firefighting exercises from 1943 to the mid-
1970s; a pit where 250 pounds of cyanide were buried in 1967; a solvent spill area where various
volatile organic compounds (VOCs) may have been spilled during paint stripping operations; and
the storm sewer system, one of the most contaminated portions of the base, where chemical
wastes from the various shops were dumped throughout the history of the base. The old
decommissioned sewage treatment plant is also of concern because cracked oxidation ponds may
have contaminated the groundwater with pesticides and industrial chemicals. Approximately
27,600 people live within 1 mile of the site, and 400 people obtain drinking water from wells
within 3 miles of the base. The nearest well lies 3,400 feet from the base. A spill of jet fuel in
1978 killed all aquatic wildlife along 2 miles of Union Creek. The creek flows 1 mile to Hill
Slough, which is a branch of Suisun Marsh, a major coastal wetland. Because Hill Slough is
tidally influenced, any contamination can reach San Francisco Bay and the Pacific Ocean. Suisun
Marsh is widely used for various recreational activities and is a major stop for migratory birds on
the Pacific Fly way.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 11/21/89
Threats and Contaminants
The groundwater is contaminated with various VOCs and heavy metals. Heavy metals,
VOCs, and polycyclic aromatic hydrocarbons (PAHs) were detected in stormwater
sewers and surface water. VOCs were found in Union Creek. People may face a
health risk if they accidentally ingest or come in direct contact with contaminated
groundwater or surface water. Contamination could pose a threat to Suisun Marsh, a
major coastal wetland located near the site.
April 1995
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Cleanup Approach
Initially, Travis Air Force Base was treated as a single investigative area with one associated
comprehensive cleanup schedule. In May 1993, as a result of negotiations with other Federal
Agencies, the base was divided into initial actions and the four remedial phases described below.
Response Action Status
Initial Actions: Twenty-seven underground storage tanks were removed from the
base in 1986.
East Industrial Area: Environmental concerns in the East Industrial Area include
four fighter training areas, a gas station complex, an inactive sewage treatment plant,
a jet fuel spill area and solvent spills. The Air Force began investigating the nature
and extent of contamination at these areas in 1990. Final cleanup actions are expected to be
selected by 1997.
Northeast Corner: The northeast corner of Travis Air Force Base is composed of
two landfills that operated from 1942 to 1974. The landfills were primarily used to
dispose of base refuse. The Air Force began investigating these landfills in early 1994
and expects to select appropriate cleanup actions in 1996.
West Industrial Area: The West Industrial Area consists of a skeet range,
two small arms training ranges, solvent spill areas, former landfill sites, a 1950 B-29
crash site, and buildings that formed the Fairfield Air Force Station. The Air Force
began investigating these landfills in mid-1994 and expects to select appropriate cleanup actions
by 1998.
Remaining Areas: Remaining contaminated areas at the site include the former
West Zone and 11 non-contiguous annex parcels. The annexes are parcels of land,
located apart from the main installation, that come under the jurisdiction of the
Travis Base Commander. In addition, other contaminated areas identified in the future that are
not associated with the areas described above will be addressed under this action. The Air Force
is currently investigating these remaining contaminated areas, and expects to select appropriate
cleanup measures in 1996.
Site Facts: Travis Air Force Base is participating in the Installation Restoration Program, a
specially funded program established by the Department of Defense (DOD) in 1978 to identify,
investigate, and control the migration of hazardous contaminants at military and other DOD
facilities.
April 1995 2 TRAVIS AIR FORCE BASE
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Environmental Progress
The removal of underground storage tanks has reduced the potential for exposure to contaminated
materials at the Travis Air Force Base site while studies are taking place and cleanup activities
are being planned.
Site Repository
Mitchell Memorial Library
510 Travis Avenue (Building 436)
Travis AFB, CA
(707) 424-3279
Vacaville Public Library
1020 Ulatis Drive
Vacaville, CA
(707) 449-6290
Fairfield-Suisun, Community Library
1150 Kentucky Street
Fairfield, CA
(707) 421-6500
TRAVIS AIR FORCE BASE
April 1995
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TREASURE ISL
NAVAL STATIC
HUNTERS POINT
ANNEX
CALIFORNIA
EPA ID# CA1170090087
EPA REGION 9
San Francisco County
San Francisco
Other Names:
ard-Hunters Point Division
lint Naval Shipyard
Site Description
The 936-acre Treasure Island Naval Station-Hunters Point Annex site was established in 1869 as
the first dry dock on the Pacific Coast. The Navy purchased the installation hi 1939 and leased it
to Bethlehem Steel Company. The Navy operated Hunters Point Annex as a shipbuilding and
repair facility from 1941 until 1976. Triple A Machine Shop then leased the facility from 1976 to
1986 and subleased numerous buildings to private tenants. The Navy began an investigation of
potential hazardous waste contamination in 1984. A study in 1987 confirmed the presence of
toxic contaminants in at least 11 site areas. In 1987, the Navy began working with the California
Department of Toxic Substances Control on an overall program to clean up these and other
potentially contaminated areas. The 11 known areas are: Industrial Landfill, Bay Fill Area, Oil
Reclamation Ponds, Scrap Yard, Old Transformer Storage Yard, Tank Farm, Sub-Base Area,
Building 503 Polychlorinated Biphenyl (PCB) Spill, Pickling and Plate Yard, Battery and
Electroplating Shop, and Building 521 Power Plant. Additional potentially contaminated areas
have been identified and will be evaluated during the site study process. A Technical Review
Committee was formed in 1988. The committee was converted to a Restoration Advisory Board
(RAB) in 1993 to include not only local, state, and federal agency representatives, but community
group representatives and local residents, as well. A technical assistance grant has been awarded
to a community group for this site; the group is also represented on the RAB. A water bottling
company draws ground water from a spring located approximately 1 mile from the site. Area
surface waters are used for various recreational activities.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 11/21/89
June 1995
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Threats and Contaminants
Groundwater, sediments, soil, and surface water are contaminated with fuels,
pesticides, heavy metals, PCBs, and volatile organic compounds (VOCs). Soil also
contains asbestos. People who accidentally ingest or come in direct contact with
contaminated soils, sediments, surface water, or groundwater may face a health risk.
Cleanup Approach
This site is being addressed in two stages: immediate actions and six long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1988 and 1989, the Navy removed abandoned hazardous
materials and industrial wastes including lead-based paint, flammables, corrosives,
poisons, and waste oil from PCB-bearing transformers. Approximately 1,500 drums
of these materials were collected, tested, packaged, labeled, and disposed of. PCB-bearing
transformers, drums, and contaminated soil were removed from the site. In 1990, approximately
226,000 square feet of asbestos-contaminated materials were removed from 24 areas on the site.
Additional removal actions, scheduled for completion by late 1995, also are being conducted for
the pickling and plate yard and the tank farm. A treatment program for the sandblast grid reused
the waste for asphalt and was completed.
Parcel A: This 90-acre parcel is primarily developed for residential use. The Navy
has investigated three utilities sites, four building sites, one underground storage tank,
and groundwater. In 1993, the Navy removed contaminated soil and the underground
storage tank. In 1994, the Navy removed additional soil. Investigations of the site are expected
to be completed by late 1995, at which time remedies for cleanup will be selected and the Parcel
A property will be transferred to the City of San Francisco. This will be the first property
transfer at the site.
Parcel B: This 66-acre parcel is primarily developed for industrial and maritime
uses. The Navy has investigated 15 areas in addition to stormdrains, sanitary
sewers, and fuel lines. Soil "hotspots" and groundwater plumes are contaminated
with petroleum, PCBs, and VOCs. Naturally occurring radiation was discovered along with
stormwater releases to San Francisco Bay. Tanks from the Tank Farm were removed in 1993.
Further investigation of seven areas are required and will begin in 1995. A bioremediation
treatability study for the remaining contaminated soils is being planned. Investigations of Parcel
B are scheduled for completion by 1996, at which time final cleanup remedies will be selected.
June 1995 2 TREASURE ISLAND NAVAL STATION-
HUNTERS POINT ANNEX
-------
Parcel C: This 77-acre parcel is primarily developed for industrial and maritime
uses. The Navy has investigated nine areas in addition to stormdrains, sanitary
sewers, and fuel lines. Navy investigations have determined that there are 15
"hotspots" contaminated with petroleum, VOCs, pesticides, heavy metals, PCBs, and semi-
VOCs. There are also six groundwater plumes contaminated with heavy metals, VOCs, and
petroleum. Dry Dock 4, which will be leased to Astoria Metals for ship dismantling, will have
contaminated sediment removed beginning in 1995. The potential further groundwater
contamination from another aquifer is suspected. Further investigations at eight other areas of
the site are being conducted. Final cleanup remedies are scheduled to be selected in late 1996.
Parcel D: This 128-acre parcel is primarily developed for industrial and maritime
uses. Investigations by the Navy have indicated that soils and groundwater are
contaminated with VOCs, petroleum, and PCBs. Further investigations are necessary
at Parcel D. Removal actions at the Pickling and Plating Yard are scheduled for completion by
late 1995. Investigations leading to the selection of final cleanup remedies are scheduled for
completion by late 1996.
Parcel E: This 135-acre parcel is primarily undeveloped and was formerly used for
landfilling and other waste disposal. Investigations indicate that the soil and
groundwater are contaminated with VOCs, petroleum, PCBs, heavy metals, and
pesticides. Three treatability studies are proposed for this parcel: bioremedialtion of soils at the
Oil Reclamation Pond; selective removal of radium dials buried at the radium dial dump and in
the landfill; and, installation of a slurry wall around the landfill/Bay Fill area. Further
investigations are planned for remaining areas of Parcel E. Final cleanup remedies are scheduled
to be selected by early 1997.
Parcel F/Basewlde: Four hundred and sixty-five acres of underwater property at
Hunters Point Annex is proposed to be included with Parcel F. An ecological risk
assessment was begun in 1993 to evaluate the level of harm to the aquatic habitat.
Other basewide activities include: an asbestos survey completed in 1994; ongoing radiation
survey; PCB-bearing transformer removal completed in 1993; completion of a sandblast grid
fixation; and steamline and stormdrain sediment removal (which have not yet begun). Final
cleanup remedies will be selected once investigations are completed.
Site Facts: Treasure Island Naval Station-Hunters Point Annex is participating in the
Installation Restoration Program, a specially funded program established by the Department of
Defense (DOD) in 1978 to identify, investigate, and control the migration of hazardous
contaminants at military and other DOD facilities. A Federal Facilities Agreement, which will
govern the site cleanup process, was signed September 28, 1990. This site is being closed under
the Base Realignment and Closure Act. Additionally, 1990 federal legislation requires the Navy
to lease the site to the City of San Francisco.
TREASURE ISLAND NAVAL STATION- 3 June 1995
HUNTERS POINT ANNEX
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Environmental Progress
The removal of hazardous materials, drums, transformers, and contaminated soil has reduced the
potential for exposure to contaminated materials at the Treasure Island Naval Station-Hunters
Point Annex site while investigations continue and final cleanup activities are being planned.
Site Repository
Contact the Region 9 Superfund Community Relations Office.
June 1995
TREASURE ISLAND NAVAL STATION-
HUNTERS POINT ANNEX
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TRW MICROWA
INC. (BUILDING 82
CALIFORNIA
EPA ID# CAD009159088
Site Description
EPA REGION 9
Santa Clara County
Sunnyvale
Other Names:
Aertech Industries
FEI
The TRW Microwave, Inc. (Building 825) site neighbors three other NPL sites: Signetics,
Advanced Micro Devices (AMD), and AMD #915. A groundwater plume from the four sites
covers 1/3 square mile in Sunnyvale. The TRW facility was occupied by Aertech Industries from
1968 until it was sold to TRW, Inc. in 1984. In 1987, TRW sold the facility to FEI Microwave,
Inc., its current occupant. The primary activity at the site was assembling and testing microwave
components, until semiconductor processing began in 1970. Primarily solvents and small
quantities of acids are used in the assembly areas for semiconductors. Solvents, acids, and heavy
metals are used in the fabrication areas and plating shop. The paint shop uses paints and solvents.
Groundwater beneath the site is contaminated with volatile organic compounds (VOCs). Acid
rinse water generated by the assembly processes is neutralized on site and is discharged to the
City of Sunnyvale sewer system. However, rinse water containing metals is not sent to the
neutralizers; it is collected in containers and disposed of off site. An underground ammonia gas
acid neutralization system was installed when the facility first opened. Floor drains and acid sinks
in the plating shop were connected to buried plumbing that carried acid waste to the
neutralization system. This system was closed in 1986, and the underground piping was sealed.
The system was replaced with three aboveground tanks. Spent solvents were stored in one of four
on-site underground tanks. Since 1983, solvents have been stored in drums and transported off
site. The closest residence is located 1,200 feet north of the site. Contaminants from the site have
the potential to migrate to deep drinking water aquifers. Municipal wells for the cities of Santa
Clara and Mountain View tap a deep aquifer that serves approximately 300,000 people.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/21/90
Threats and Contaminants
Groundwater and soil contain various VOCs. People who accidentally ingest or come
in direct contact with contaminated groundwater or soils may be at risk. The deep
aquifer, used as a drinking water source, is not contaminated; however, the shallow
aquifer is contaminated. There are some agricultural wells that could act as conduits
for contaminant migration between the shallow contaminated aquifer and the deep
aquifer.
April 1995
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Cleanup Approach
Response Action Status
Initial Actions: Four spent solvent underground tanks, along with some soil, were
removed in 1973, 1976, 1980, and 1983. In 1984, 120 cubic yards of contaminated
soils were excavated and transported to an EPA-approved hazardous waste facility.
The site was backfilled to the surface with gravel, and concrete was poured over the gravel to
prevent rainwater from seeping into the pit. This water extraction pit is part of an eight-well
groundwater extraction system operated by TRW. Since 1985, groundwater has been pumped
from seven on-site extraction wells and the pit to prevent VOCs from migrating off site and to
extract the groundwater for cleanup. On-site groundwater is treated by an air stripper and then
discharged to Calabasas Creek. In addition, groundwater has been pumped from a total of 24 off-
site extraction wells and conveyed through an underground piping system to the air strippers
located at the AMD #915 site. Approximately 20 percent of the water is treated and then
discharged to a storm drain, which empties into the Calabasas Creek. The remainder is used as
process water by AMD #915.
Entire Site: In 1989 under State oversight, TRW began investigating the type and
extent of contamination remaining on the site. TRW completed the investigation in
early 1991. The final cleanup remedy selected in late 1991 was the continuation of
groundwater extraction and air stripping, which will proceed until established cleanup goals are
met.
Site Facts: In 1984, the State issued an order requiring AMD, Signetics, and TRW to develop a
joint plan to prevent further migration of contaminants. New orders in 1989 required TRW to
submit an investigation and proposed cleanup plan with AMD and Signetics.
Environmental Progress
Construction of all cleanup remedies is complete. The removal of tanks and contaminated soil has
reduced the potential for exposure to contaminated materials at the TRW Microwave, Inc.
(Building 825) site while groundwater continues to be treated.
Site Repository
Regional Water Quality Control Board, San Francisco Bay Region
2101 Webster Street, Suite 500, Oakland, CA 94612
April 1995 2 TRW MICROWAVE, INC. (BUILDING 825)
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UNITED
CO.
CALIFORNIA
EPA IDf CAD981436363
Site Description
From 1948 through 1965, several companies leased the United Heckathorn Co. site, located on
the northern 41/2 acres of the Levin-Richmond Terminal Corporation's property, to process
chemicals. Site owners included Parr Industrial Corporation (1947 to 1961), Parr Richmond
Terminal Corporation (1961 to 1981), and Levin-Richmond Terminal Corporation (1981 to the
present). In the late 1940s and early 1950s, Universal Pigment and Chemical Company produced
napalm on site. From 1958 to 1965, Montrose Chemical Corporation contracted with United
Heckathorn, United Chemetrics, and ChemWest for pesticide-grinding services. United
Heckathorn was the last company to formulate pesticides at this site. The California Department
of Fish and Game has recorded several instances of chemicals being discharged into the Lauritzen
Canal, including naphthenic acid in 1951 and the pesticide DDT in 1960. In 1980, the State
found elevated levels of pesticides in the soil. In 1988, the EPA detected DDT in the air at
numerous locations on and off site. The site is adjacent to the Lauritzen Canal. The canal is on
the Richmond Inner Harbor, which is on the San Francisco Bay. The Harbor is used for
recreational and commercial fishing and shellfish harvesting. A coastal wetland is located less
than 1/2 mile from the site. Approximately 10,900 people live within 1 mile of the site.
Site Responsibility: This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/26/89
Final Date: 03/14/90
Threats and Contaminants
Air contains various pesticides. Sediments in the Lauritzen Canal and site soils are
contaminated with pesticides, including DDT and dieldrin. People who accidentally
ingest or come into direct contact with contaminated soils or sediments may be at risk.
Contaminants hi the wetlands or other bodies of water may harm wildlife in or around
the water. People who ingest contaminated shellfish also may be at risk. Results of the
State of California Mussel Watch Program show that the highest levels of DDT and
dieldrin bioaccumulation in fish across the State occur in the waters near mis site.
April 1995
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Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: Under a Unilateral Order issued by the EPA in September
1990, the potentially responsible parties removed approximately 2,500 cubic yards of
pesticide residue and contaminated soil from the shoreline. The residue contained
high quantities of the pesticides DDT and dieldrin. The action was completed in 1991.
Entire Site: In 1994, the EPA completed investigations that determined the nature
and extent of contamination at the site. Based on the results of this investigation, late
in 1994 the EPA recommended dredging marine sediments that are contaminated with
DDT and dieldrin. The EPA believes this action will protect human health and the environment
from further harm. The engineering design for dredging is underway and cleanup is expected to
begin shortly.
Environmental Progress
The removal of contaminated soils has reduced the potential for exposure to pesticide
contaminants from the United Heckathorn Co. site while cleanup activities are being planned.
Site Repository
Richmond Public Library, 325 Civic Center Plaza, Richmond, CA 94804
April 1995
UNITED HECKATHORN CO.
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VALLEY WO
PRESERVING,
CALIFORNIA
EPA ID# CAD063020143
EPA REGION 9
Stanislaus County
miles southwest of Turlock
\
Site Description
The 13-acre Valley Wood Preserving, Inc. site was in operation from 1973 until the County
revoked the company's license in 1979. The wood preserving process involved pressure treating
lumber with an aqueous chromated copper arsenate (CCA) solution. This solution was mixed in
an above ground tank near the site boundary and was stored in three adjacent above ground
tanks. Water was piped to the mixing tanks from a well. After the treatment cycle, the wood-
treatment solution was drained into sumps and was pumped back to the mixing tank for reuse.
The areas around the treatment cylinders and storage tanks were unpaved during the first two
years of operation. Asphalt paving now covers areas where treated wood was once stored on the
ground. Paved areas were added from 1975 to 1978 as the plant increased production. In 1979,
the California Regional Water Quality Control Board (CRWQCB) identified toxic wood-treating
chemicals in an on-site storage pond, monitoring wells, and on- and off-site soils. Approximately
34,000 people live within 3 miles of the site. The City of Turlock municipal wells, which draw
water from an aquifer underlying the site, serve 26,200 people within 3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 03/31/89
Threats and Contaminants
Ground water and soil contain hexavalent chromium and arsenic. The upper aquifer is
contaminated. Private and irrigation wells draw water from the upper aquifer. People
who accidentally ingest or come into direct contact with contaminated groundwater or
soil may suffer adverse health effects.
April 1995
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Cleanup Approach
This site is being addressed in two stages: emergency actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Emergency Actions: After closing the site, the company excavated and disposed
of approximately 1,500 cubic yards of contaminated soil. During initial groundwater
cleanup from 1979 to 1983, approximately 70,000,000 gallons of chromium-
contaminated groundwater were extracted. The groundwater was treated by an electrochemical
treatment process and then discharged to paved depressions for evaporation. The purpose of this
action was to retard plume movement and to protect domestic wells downgradient from the site.
Additionally, Valley Wood Preserving removed sludge from the tank that would be used to hold
water from pumping for testing; drilled several wells, originally used for monitoring, and now
used for groundwater extraction; removed underground storage tanks; and drilled three deep
wells as an alternate source of drinking water for three homes.
Entire Site: The potentially responsible parties conducted an investigation to
determine the type and extent of contamination on the site. In 1991, the EPA selected
remedies to address soil and groundwater contamination at the site. The major
components of the selected remedies are continued extraction of contaminated groundwater
followed by electrochemical treatment and alumina adsorption. The treated groundwater will be
reinjected. Contaminated soils will be treated by chemical fixation, followed by on-site disposal.
The EPA currently is designing the selected remedies, slated for completion in 1995. The
completion of the design phase was delayed to allow for a one-year, full-scale pilot study of an
innovative groundwater remedy. It has not yet been determined who will conduct actual cleanup
activities at the site.
Site Facts: In 1989, the EPA and Valley Wood Preserving entered into a Consent Order which
required the company to conduct emergency actions including the on-site removal and treatment
of contaminated groundwater. The potentially responsible parties continue to extract and treat
groundwater in accordance with the Consent Order. In 1990, Valley Wood Preserving and the
EPA entered into a Consent Order requiring the company to conduct an investigation of the site.
Environmental Progress
Removing tanks and contaminated soil, extracting and treating groundwater, and providing an
alternate water supply have reduced the potential for exposure to site contaminants at the Valley
Wood Preserving, Inc. site while final remedies are being designed.
April 1995 2 VALLEY WOOD PRESERVING, INC.
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Site Repository
Stanislaus County Library, Turlock Branch, 550 Minaret Avenue, Turlock, CA 95380
VALLEY WOOD PRESERVING, INC.
April 1995
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WASTE DISP
INC.
CALIFORNIA
EPA ID# CAD980884357
EPA REGION 9
Los Angeles County
Santa Fe Springs
Site Description
The 40-acre Waste Disposal, Inc. site contains a concrete-lined pond, oil sumps, and a solid
waste landfill. The company operated the facility from 1928 to 1965. The facility was licensed by
the California Regional Water Quality Control Board (CRWQCB) to accept acetylene sludge,
brewery residue, and fluids from cesspool operations. It also was licensed by the Los Angeles
County Engineer to accept rotary drilling muds, construction debris, and oil field sump sludges.
The 15,000 residents of Santa Fe Springs obtain drinking water from wells within 3 miles of the
site. The closest residence is within 50 yards of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 06/10/86
Final Date: 07/22/87
Threats and Contaminants
The soil is contaminated with metals, poly nuclear aromatic hydrocarbons (PNAs) and
volatile organic compounds (VOCs). Most of the contamination has been detected in
subsurface soils, which are covered with relatively clean fill. However, people may be
exposed to potential health hazards by accidentally ingesting or coming into direct
contact with contaminants in the soil.
Cleanup Approach
This site is being addressed in two stages: an immediate action and a long-term remedial phase
focusing on cleanup of the entire site.
April 1 995
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Response Action Status
Immediate Action: The EPA erected a fence around the site in 1988 to prevent
direct contact with site contaminants.
Entire Site: In 1988, the EPA began a study to determine the nature and extent of
contaminatiqn at the site and to identify possible long-term cleanup actions. Late in
1993, the EPA selected a final remedy to address soils and subsurface gas at the site.
This remedy consists of building a hazardous waste cap, with gas extraction and treatment, if
necessary. Design activities for the cap and extraction and treatment system are underway and are
scheduled to be completed in late 1995. The EPA also is investigating groundwater contamination
and expects to select a final remedy in late 1996.
Environmental Progress
Fencing the site has reduced the potential for exposure to contaminants at the Waste Disposal,
Inc. site while groundwater studies are taking place and soil cleanup activities are being designed.
Site Repository
Santa Fe Springs City Library, 11700 East Telegraph Road, Santa Fe Springs, CA 90670
April 1995
WASTE DISPOSAL, INC.
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WATKINS-JOHNS
COMPANY (STEW
DIVISION)
CALIFORNIA
EPA ID# CAD980893234
Site Description
EPA REGION 9
Santa Cruz County
Scotts Valley
The plant on the 3-acre Watkins-Johnson Company (Stewart Division) site began to manufacture
industrial furnaces and electrical parts in 1963. The California Regional Water Quality Control
Board (CRWQCB) and Watkins-Johnson detected volatile organic chemicals (VOCs) in the on-
site soil and groundwater in 1984. The contamination probably resulted from improper handling
of hazardous waste generated during plant operations. Access to the site is limited to employees
by a fence and controlled gate. Approximately 10,600 people living within a 3-mile radius of the
site obtain their drinking water entirely from groundwater sources.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 01/22/87
Final Date: 08/30/90
Threats and Contaminants
Groundwater and soil are contaminated with various VOCs. On-site workers could be
exposed to contaminants through direct contact with or accidental ingestion of
contaminated soils or groundwater.
April 1995
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Cleanup Approach
Response Action Status
Interim Actions: In response to a Cleanup and Abatement Order from the
CRWQCB, the Watkins-Johnson Company began an interim program to pump and
treat contaminated groundwater in 1986. Current groundwater monitoring data show
that the extraction network has successfully stopped the migration of the VOC plume.
Entire Site: The remedy selected by the EPA in 1990 includes: installing a soil
vapor extraction system; installing a groundwater extraction and treatment system;
treating the extracted groundwater with granular activated carbon and discharging the
treated groundwater into nearby Bean Creek; and monitoring the groundwater and soil.
Construction of the treatment systems was completed in late 1994. Soil and groundwater cleanup
is now underway and will continue until established cleanup goals are met.
Environmental Progress
Construction of all remedies is complete. Pumping and treating contaminated groundwater has
reduced the size of the plume and the threats posed to the nearby population. The soil vapor
extraction and treatment system is reducing VOC concentrations in the soil so that they no longer
present a threat to the groundwater.
Site Repository
Santa Cruz City-County Library, Scotts Valley Branch, 230-D Mount Hermon Road,
Scotts Valley, CA 95066
April 1995
WATKINS-JOHNSON COMPANY
(STEWART DIVISION)
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WESTERN PAC
RAILROAD CO
CALIFORNIA
EPA ID# CAD98089467*?
•
EPA REGION 9
Butte County
2 miles south of Oroville
Other Names:
Western Pacific Railroad
Roundhouse Facility and Yard
Site Description
The 90-acre Western Pacific Railroad Co. site located near Oroville operated as a rail yard from
1920 until 1982. A wooden structure known as the roundhouse was used to fuel, repair, service,
and clean rail cars. Specific activities included sandblasting, welding, cutting, and fabricating. As
a result of these activities, waste solvents, oils, grease, and wastewaters containing heavy metals
were discharged to an unlined surface impoundment until 1987. This impoundment was cleaned
up by the current owner, Union Pacific, in 1989 in response to an order issued by the California
Regional Water Quality Control Board (CRWQCB). A concrete tank containing an unknown,
oily-like substance also was located on site. Fuel-contaminated soil is located on the site. Four
California Water Service Company (CWS) wells are located within 3 miles of the site. Water
from the wells is blended with water from the Feather River to serve the company's 10,000
customers. One of the wells is located on the site and is leased by Western Pacific to CWS. The
Feather River is located 1 mile from the site in the direction of surface water runoff and is used
for recreational activities.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPl LISTING HISTORY
Proposed Date: 10/26/89
Final Date: 08/30/90
Threats and Contaminants
Groundwater on site is contaminated with various volatile organic compounds (VOCs).
The surface impoundment was contaminated with heavy metals including arsenic,
lead, and chromium. Potential health threats to people include drinking contaminated
groundwater or accidentally ingesting contaminated soil.
April 1995
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Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: Under State supervision, soils and sludges associated with the
surface impoundment were removed and transported to Utah, where they were
recycled into asphalt road base. The two 30-gallon concrete sumps were closed; soil
samples collected from the surrounding area at the sumps revealed no contamination. The
underground oil/waste separator was emptied and backfilled with clean soil. The underground
storage tank was removed. An extraction system is pumping and treating a plume of
contaminated groundwater near the former underground storage tank.
Entire Site: Contaminated soils found in the fueling area and adjacent to the
abandoned oil/water separator currently are being analyzed. Quarterly groundwater
monitoring by the Union Pacific still is being conducted to determine the need for
additional cleanup activities. Union Pacific will conduct a baseline risk assessment for the site to
determine potential risks to human health and the environment. Based on the results of the soil
analysis and risk assessment, the EPA will recommend appropriate cleanup actions.
Site Facts: In 1989, the State issued a Cleanup and Abatement Order to Union Pacific and
Solano Railcar, the potentially responsible parties, requiring them to sample abandoned water
supply wells to determine the best way to seal them, to install a water separator to collect runoff
from locomotives, and to install equipment to prevent runoff. In 1993, Union Pacific signed an
agreement with the EPA to clean up the VOC-contaminated water. In 1994, Union Pacific signed
an agreement with the EPA to complete the soil analysis and baseline risk assessment.
Environmental Progress
The removal of soils and sludges has virtually eliminated the sources of contamination from the
impoundment. The EPA, the State, and Union Pacific will continue to assess the site to determine
if other sources of contamination exist at the Western Pacific Railroad Co. site.
Site Repository
Butte County Public Library, Oroville, California
April 1995 2 WESTERN PACIFIC RAILROAD CO.
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WESTINGHOUSE
ELECTRIC CORP.
(SUNNYVALE PLANT)
CALIFORNIA
EPA ID# CAD001864081
EPA REGION 9
Santa Clara County
Sunnyvale
Site Description
The 75-acre Westinghouse Electric Corp. (Sunnyvale Plant) site was formerly used to
manufacture electrical transformers. It is currently.is used to manufacture steam generators,
marine propulsion systems, and missile launching systems for the Department of Defense.
Groundwater contamination is believed to have resulted from a leaking polychlorinated biphenyls
(PCBs) storage tank and from localized spills. This is one of 28 sites in the South Bay Area of
San Francisco. Facilities at these sites have used a variety of toxic chemicals, primarily
chlorinated organic solvents, which have contaminated a common groundwater basin. Although
the sites are listed separately on the NPL, the EPA intends to combine cleanup activities at some
of the sites as part of an area-wide approach to the contamination. Most of the contaminated
areas on site have been removed or have been paved over. Access to the site is restricted.
Approximately 710,000 people live within 3 miles of the site. The nearest residence is located
adjacent to the site. Approximately 300,000 people depend on groundwater within 3 miles of the
site for their drinking water supply. There are no private wells within the vicinity of the site;
however, area municipal wells are located within 1/4 mile of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Groundwater and soil are contaminated with PCBs, fuels, and volatile organic
compounds (VOCs). Potential health threats to area residents include accidentally
ingesting or coming into direct contact with site contaminants.
April 1995
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Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: Westinghouse removed contaminated soils in 1984 and 1985,
and a gasoline tank in 1986.
Entire Site: Westinghouse completed an investigation into the nature and extent of
contamination at the site in 1991. The EPA selected the following remedies to address
groundwater and soil contamination: extracting and treating groundwater, conducting
off-site incineration of soil contaminants, and implementing land-use restrictions at the site. The
company, under EPA supervision, completed the detailed specification for the groundwater and
soil cleanup plans in the summer of 1994. Construction of the remedies began in later in 1994.
Soils in the main plant areas and the underground storage tank area were removed in late 1994.
Full-scale treatment of the contaminated groundwater began in early 1995 and will continue until
established cleanup goals are met.
Site Facts: In 1984 and 1985, the State issued Waste Discharge Requirements to Westinghouse,
requiring the company to conduct interim cleanup measures and to investigate the nature and
extent of contamination at the site. In 1988, Westinghouse entered into an agreement to
investigate the contamination problems at the site and to evaluate potential cleanup options. In
1992, Westinghouse entered into an agreement with the EPA to develop a detailed design of the
cleanup activities. The EPA approved the final detailed design on June 28, 1994.
Environmental Progress
The removal of contaminated soil and a gasoline tank, and the operation of the groundwater
treatment system has reduced the potential for exposure to contaminated materials at the
Westinghouse Electric Corp. (Sunnyvale Plant) site. Cleanup activities will continue until
established standards are met.
Site Repository
Sunnyvale Public Library, 665 West Olive Avenue, Sunnyvale, CA 94088
April 1995
• U.S. GOVERNMENT PRINTING OFFICE: 1995-386-549/^2022
WESTINGHOUSE ELECTRIC CORP.
(SUNNYVALE PLANT)
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